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JimB![Project donor](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="20" height="16"><rect fill-opacity="0"/></svg> "Project donor") Honorary cruncher
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![Discovered 1 mega prime](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="22" height="22"><rect fill-opacity="0"/></svg> "Discovered 1 mega prime")  
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Welcome to the extended Sierpinski Problem
In 1962, John Selfridge discovered the Sierpinski number k = 78557, which is believed to be the smallest such number. The Sierpinski problem attempts to prove that it is, in fact, the smallest Sierpinski number. In 1976, Nathan Mendelsohn determined that the second provable Sierpinski number is the prime k = 271129. The prime Sierpinski problem attempts to prove that this is the smallest prime Sierpinski number.
Should both of these problems be solved, k = 78557 will be established as the smallest Sierpinski number, and k = 271129 will be established as the smallest prime Sierpinski number. However, this would not prove that k = 271129 is the second provable Sierpinski number. Since the prime Sierpinski problem is testing all prime k's for 78557 < k < 271129, all that's needed is to test the composite k's for 78557 < k < 271129. Thus, the extended Sierpinski problem is established.
As of October 2012, there remain 14 composite k's for which no primes have been found. They are as follows:
91549, 94373, 99739, 131179, 161041, 163187, 193997, 200749, 202705, 209611, 211195, 227723, 229673, 238411
The most current results can be found here: PSA PRPNet extended Sierpinski Problem. For a more detailed history and status of the extended Sierpinski problem, please visit Wilfrid Keller's The Sierpiński Problem: Definition and Status.
To participate in the search, add the following server/port to your prpclient.ini file (adjust project share accordingly):
server=ESP:100:1:prpnet.mine.nu:13005
NOTE: For those new to PRPNet, please see the Welcome to PRPNet post.
Server Stats
Primes found by PrimeGrid
The most current results can be found here: PSA PRPNet extended Sierpinski Problem
198677*2^2950515+1 found by Ardo van Rangelrooij on 23 October 2012
147559*2^2562218+1 found by Rodger Ewing on 27 March 2012
123287*2^2538167+1 found by Timothy D Winslow on 14 March 2012
250463*2^1316921+1 found by Rodger Ewing on 30 April 2010
219259*2^1300450+1 found by Lennart Vogel on 29 Appil 2010
154801*2^1305084+1 found by Rodger Ewing on 29 April 2010
98749*2^1045226+1 found by Rodger Ewing on 09 April 2010
107929*2^1007898+1 found by Brian Carpenter on 05 April 2010
85013*2^699333+1 found by Steve Martin on 25 March 2010
225679*2^620678+1 found by Lennart Vogel on 24 March 2010
187681*2^573816+1 found by Lennart Vogel on 23 March 2010
168587*2^545971+1 found by Steve Martin on 23 March 2010
208381*2^463068+1 found by Lennart Vogel on 22 March 2010
167957*2^417463+1 found by Brian Carpenter on 21 March 2010
185449*2^435402+1 found by Rodger Ewing on 21 March 2010
261203*2^354561+1 found by Lennart Vogel on 20 March 2010
227753*2^91397-1 found by Lennart Vogel 13 March 2010 |
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Cool. Just started 2 dual cores and a quad core on this. =)
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![Profile](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="15"><rect fill-opacity="0"/></svg> "View the profile of Michael Goetz") Michael GoetzVolunteer moderator
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The server stats page shows the value of K=263329 as being one of the k's being searched. But your post, and the Sierpinski problem web page you reference both list 261203 as the highest K to be searched (and it was eliminated just today by Lennart!!!).
What's the story with 263329?
Thanks,
Mike
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JohnHonorary cruncher
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The server stats page shows the value of K=263329 as being one of the k's being searched. But your post, and the Sierpinski problem web page you reference both list 261203 as the highest K to be searched (and it was eliminated just today by Lennart!!!).
What's the story with 263329?
Nice catch!!!
In the preliminary work to prepare the project, we double checked all primes to establish minimal n. There's one remaining prime left in that effort. Referencing The Sierpiński Problem: Definition and Status page, you can see that k=263329 was found prime at n=406934 by Kevin O'Hare on 05 Aug 2006.
All other primes have been confirmed minimal for their specific k.
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Michael GoetzVolunteer moderator
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I guess I might as well shoot for really understanding the rest of it...
On the server stats page, what is the difference between the "lowest primes" and "PRPs/Primes" columns? For that matter, what does PRP stand for?
Similar or identical question on the user stats page: What's the difference between "PRPs found" and "Primes found"?
Lastly, on the user primes page, what's the difference between candidates and the primes?
Thanks again,
Mike
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JohnHonorary cruncher
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First note that PRPNet is still under development so there are still bugs being worked on.
On the server stats page, what is the difference between the "lowest primes" and "PRPs/Primes" columns? For that matter, what does PRP stand for?
Lowest prime is the lowest n for that k that results in a prime. The PRPs/Primes column is a count column identifying how many PRPs/Primes have been found. PRP stands for "probable prime". Some of the tests available in PRPNet only test for probable primes. They must further be tested for primality.
For the page referenced, the PRPs/ Primes column should display a 1 for where primes have been found. This is a bug that's already fixed in the next release.
Similar or identical question on the user stats page: What's the difference between "PRPs found" and "Primes found"?
See answer above.
Lastly, on the user primes page, what's the difference between candidates and the primes?
Candidate is a term given to numbers that are being tested for primality. Thus, a candidate can either end up composite or prime.
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i've got mail from john and it clears my confusion.
i saw geeknik had the last prime pending for over 4h, but then it disappeared and pilgrim got the task and reported it as prime.
wouldnt it be fair, if both of them get the prime as dc accounted?
EDIT: which version of prpnet should be used instead of 3.2.1b?
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JohnHonorary cruncher
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i saw geeknik had the last prime pending for over 4h, but then it disappeared and pilgrim got the task and reported it as prime.
wouldnt it be fair, if both of them get the prime as dc accounted?
EDIT: which version of prpnet should be used instead of 3.2.1b?
Yes, we can find a way for them to share credit as double checkers. Note that the prime was already found by Kevin O'Hare on 05 Aug 2006. This was just a DC effort to confirm that it was the minimal prime for that k.
As for which version to use, 3.2.1-beta is fine as long as you comment out the pfgw call in the master_prpclient.ini file:
Windows
pfgw=pfgw.exe
Linux
pfgw=./pfgw
By commenting out pfgw, this client will not be able to participate in the Factorial and Primorial prime search ports.
port 12002: FPS
port 12008: PRS
However, it will work on all other ports.
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I'm shutting down PRPNet on all of my machines. I'm going to install BOINC on all of the machines since that project is stable and I will get credit for all of the work that I do. I have over 30 cores running various PrimeGrid projects and I can't keep track of what version is on what machine, so I'll just simplify the issue and run BOINC. =)
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HAmstyVolunteer tester
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grats geeknik, you've found a new one.
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Michael GoetzVolunteer moderator
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Grats, Geeknik, for knocking off one of the k's!!!
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Thanks for the congrats! If it wasn't for the posts here, I wouldn't know that I knocked one of the Ks out of the search. :) According to my PC, I found 263329*2^406934+1 at 6:31AM local time (11:31 UTC). Server shows Pilgrim got credit for it at 13:44 UTC. But whatever, I'm not going to lose sleep over it. These machines will be doing BOINC by tomorrow morning. :)
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Michael GoetzVolunteer moderator
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Thanks for the congrats! If it wasn't for the posts here, I wouldn't know that I knocked one of the Ks out of the search. :) According to my PC, I found 263329*2^406934+1 at 6:31AM local time (11:31 UTC). Server shows Pilgrim got credit for it at 13:44 UTC. But whatever, I'm not going to lose sleep over it. These machines will be doing BOINC by tomorrow morning. :)
Nope, you actually found 2 primes. The one we were congratulating you about was the other one; the one you found all by yourself (k=167957).
The rest of us mere mortals are jealous!
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HAmstyVolunteer tester
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Pilgrim killed another k, k=185449.
Congratulations
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HAmstyVolunteer tester
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grats lennart.
you eliminated another k, k=208381 ... 26 remaining...
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grats lennart.
you eliminated another k, k=208381 ... 26 remaining...
Thanks :) I hope we can nock out some more today :)
Lennart
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JohnHonorary cruncher
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Congratulations Everyone!
The leading edge has now reached "Top 5000" reportable. Well done!!! Since 14 March when this effort was in its prep stage, 8 new primes have been found (3 in the last two days). There are now 26 candidates remaining.
Up to n=1M has now been loaded into the database. Thank you to everyone for contributing to this effort. :)
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Excellent!
Please post top5000 reporting details? I'd guess finder, PrimeGrid, SrSieve, LLR ? ie same as PPS LLR?
(only asking since the server publishes the prime data)
I presume the usual Fermat Number divisibility checks should be done at some point too?
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JohnHonorary cruncher
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Please post top5000 reporting details? I'd guess finder, PrimeGrid, SrSieve, LLR ? ie same as PPS LLR?
(only asking since the server publishes the prime data)
I presume the usual Fermat Number divisibility checks should be done at some point too?
Since primes are reportable to the "Top 5000", we are experimenting with the prime suppression feature available in PRPNet. It is set, so now primes should not be displayed. Let's find one now and test it out. :)
Yes, reporting will be what you guessed: prime finder, PrimeGrid, Srsieve, LLR. And yes, with PFGW commented out, we are testing for xGFN divisibility outside PRPNet.
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Just to be clear, if we're actually to solve the "extended Sierpinski problem" (proving that 271129 is the second Sierpinski number) , we not only need to find primes for all the k's in this project, but we also have to have found primes for all the k's in both the Sierpinski problem (SoB) and the prime Sierpinski problem.
Is that correct, or is there some other inherent value in proving that these composite k's not covered by the other two projects have primes?
Mike
P.S. And congrats to whomever just found the latest prime for k=168587! (The stat pages are acting up so I'm not sure whom it was.)
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HAmstyVolunteer tester
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Steve_Martin@SETI.USA seems to be the lucky one.
grats Steve
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JohnHonorary cruncher
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Steve_Martin@SETI.USA seems to be the lucky one.
Yes, congratulations to Steve Martin. Unfortunately, the suppress feature did not work. Whenever anyone attempted to access the user_primes.html page, it would take down all the stats. Therefore, we had to disable the feature. All stats pages are working fine now.
Now if we can just get Steve to see his emails. :) He's got 2 primes, 1 also from PRPNet PPSE.
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the problem persists, stats are down and lennart found another prime :)
grats lennart, again
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JohnHonorary cruncher
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the problem persists, stats are down and lennart found another prime :)
Yes, it would help if we updated the correct ini file. The ESP port was still set for suppress. It's corrected now.
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JohnHonorary cruncher
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Just to be clear, if we're actually to solve the "extended Sierpinski problem" (proving that 271129 is the second Sierpinski number) , we not only need to find primes for all the k's in this project, but we also have to have found primes for all the k's in both the Sierpinski problem (SoB) and the prime Sierpinski problem.
That's it in a nutshell. :)
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Michael GoetzVolunteer moderator
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Looks like the stats pages are down again.
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Looks like the stats pages are down again.
Yes but now it is up :)
as before it was a new prime causing the downtime
It does not help to set unhide=0
becuse it will be marked hidden when it is recived , after that it can take up to 10 min befor server unhide the primes.
We are working with Mark on those problem.
Thank's to all who help us here. I think it is fun :)
Lennart
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Michael GoetzVolunteer moderator
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I'm getting "pgllr.mine.nu:9000 connect to socket failed" trying to get new tasks to crunch.
EDIT: And, of course, moments after posting that, it starts working again!
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Steve_Martin@SETI.USA seems to be the lucky one.
Yes, congratulations to Steve Martin. Unfortunately, the suppress feature did not work. Whenever anyone attempted to access the user_primes.html page, it would take down all the stats. Therefore, we had to disable the feature. All stats pages are working fine now.
Now if we can just get Steve to see his emails. :) He's got 2 primes, 1 also from PRPNet PPSE.
Have the e-mails, There is a mix up with reporting passwords, John B. is helping out with the problem. I hope he can fix it.
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Michael GoetzVolunteer moderator
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Steve,
Congrats on finding another prime!
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I have been watching this thread and seeing the primes fall rather quickly. Was this expected to happen so fast? It sounds like this problem has existed for quite a while, and all of a sudden BAM! a ton of them are eliminated. Just was wondering. Great job by all!
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Michael GoetzVolunteer moderator
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I have been watching this thread and seeing the primes fall rather quickly. Was this expected to happen so fast? It sounds like this problem has existed for quite a while, and all of a sudden BAM! a ton of them are eliminated. Just was wondering. Great job by all!
I don't know enough about the subject to comment on the expected distribution of the primes for the various k's, but one thing is obvious: The processing time for the lower n's is MUCH faster than for higher n's. As a result, in the first few days, a tremendous number of k/n pairs were tested. Even if the distribution of primes over the range of n's is constant, you would expected the rate (as compared to time) of discoveries to drop off rapidly, even if the rate of discovery vs. the number of WUs remains constant.
Processing time today for each task is almost quadruple what it was when the project went public a few days ago as a result of n increasing from the 300K range to the 700K range.
On the positive side, every prime we find knocks a k out of the pool for future testing, so while each test takes longer, there's less testing to be done.
On the negative side, Seventeen or Bust still has 6 k's remaining and n is in the 17 million range, with task run-times roughly 1,000 times longer than the ESP tasks we're running in the 700K range. I don't think anyone expects this to be completed quickly.
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Well the search is for the 2nd lowest sierpinski number. That's not quite like searching for the first.
Are the 3rd and 4th lowest of same interest? |
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Actually, it's worse than searching for the first, because we need this project *and* SoB *and* PSP to complete to be able to prove this is the 2nd! And I suspect that all 3 projects will likely need to continue to ludicrous levels to kill off each of the last primes.
I don't see the 3rd or 4th being of particular interest at this time. ESP is effectively an opportunistic "fill-in", and that's a good thing in my opinion.
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Is there anyone else running a PS3 here in PSA?
I would just love to get a prime on mine
Steve
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LexsVolunteer developer
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Is there anyone else running a PS3 here in PSA?
Not at the time, but sometimes especially for challenges PS3 is very helpful.
Mine seems to have a fan problem and gets very loud, although I'm removing the dust inside from time to time.
BTW I provide the prpclient-bundle for PS3, so if you ever experience trouble with that just let me know.
If you're interested I also got a genefer version which runs on the SPUs or even CUDA although I only tested the latter one in emulation-mode. But they're both a little bit unstable.
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You guys running PS3s, don't upgrade to Sony's new 3.21 firmware. It kills the Other OS option on ALL pre-slim PS3s. :)
http://blog.eu.playstation.com/2010/03/29/ps3-firmware-3-21-coming-april-1st/
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You guys running PS3s, don't upgrade to Sony's new 3.21 firmware. It kills the Other OS option on ALL pre-slim PS3s. :)
http://blog.eu.playstation.com/2010/03/29/ps3-firmware-3-21-coming-april-1st/
Mixed emotions over this. One, sadness that Sony could pull such a dick move. Two, glee: if I can't have prime crunching fun on my PS3 (I own a Slim), no one can. I'm a bad person. |
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LexsVolunteer developer
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Two, glee: if I can't have prime crunching fun on my PS3 (I own a Slim), no one can. I'm a bad person.
Maybe you can in future, as soon as the firmware is modded to even boot linux on a slim.
$ony declared the war, now they have to bear with the consequences. Bad marketing as always on $ony's side. |
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Actually, it's worse than searching for the first, because we need this project *and* SoB *and* PSP to complete to be able to prove this is the 2nd! And I suspect that all 3 projects will likely need to continue to ludicrous levels to kill off each of the last primes.
I don't see the 3rd or 4th being of particular interest at this time. ESP is effectively an opportunistic "fill-in", and that's a good thing in my opinion.
Yes, as Vato points out, the extended Sierpinski problem is the most Challenging of the three projects. All three projects must complete in order to prove that k=271129 is the second Sierpinski number.
Regarding the next few Sierpinski numbers, Wilfrid Keller has shared the following information:
I have just verified that between 271129 and 271577, the 2nd and 3rd proven Sierpinski numbers, there is certainly no other. So the 2nd and 3rd are anyway known to be _consecutive_.
The list continues as follows:
k = 78557, 271129, 271577, 322523, 327739, ...
Then, for 322523 and 327739 I could also quickly show that they are consecutive Sierpinski numbers.
Therefore, should the extended Sierpinski problem prove that k=271129 is the second Sierpinski number, then 271577 will also be proven as the third Sierpinski number.
To prove the fourth Sierpinski number, it must be shown that no prime k*2^n+1 exists for 271577<k<322523. In doing so, the fifth Sierpinski number, k=327739, will also be proven. However, at this time, there is no particular interest in proving that k=322523 is the fourth Sierpinski number.
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ESP Update
The initial goal of n=500K was quickly achieved and soon the secondary goal of n=1M will be reached. What started out as an interesting side project has now grown into a full-fledged search. Thank you to everyone who has contributed so far.
However, at n=1M, the project will be suspended as further sieving is required. Due to limited resources, only 1M-3M is being sieved. This is definitely not ideal. If further interest remains with this project, then a consideration will be given to establishing an ESP sieve effort in the sieving thread and expanding the max n.
Thank you once again for making this such a successful search.
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Number of tests went down. will there be a lucky punch on one k? ;-)
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All tests have been sent out. :)
[2010-04-02 08:48:36 GMT] ESP: INFO: No available candidates are left on this server.
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Yep ! ;-) just right in time to move over to the PFDMC and get some work done before 18UTC
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If further interest remains with this project, then a consideration will be given to establishing an ESP sieve effort in the sieving thread and expanding the max n.
Yes please!
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I have eliminated k=107929. 303413 digits. Not bad. =)
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FUCK THIS PROJECT AND THEIR COMMIE BULLSHIT POLITICS |
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I have eliminated k=107929. 303413 digits. Not bad. =)
Well done :)
Congrats .....
Lennart |
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If further interest remains with this project, then a consideration will be given to establishing an ESP sieve effort in the sieving thread and expanding the max n.
Yes please!
I would also be very interested in helping sieve for this project.
P.S. Congrats on the latest k, geeknik!
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I don't sieve anymore (unless I get a badge for it), but I will support those who do, so please, get some people sieving so I can knock a few more Ks off the list. =)
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FUCK THIS PROJECT AND THEIR COMMIE BULLSHIT POLITICS |
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JohnHonorary cruncher
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ESP Sieving
ESP sieving has been opened in the PST forum. You can access it here: ESP Sieving Reservation
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JohnHonorary cruncher
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Prime Found!!!
Another k eliminated: 98749*2^1045226+1 is prime! Found by Pilgrim on Fri Apr 9 12:23:05 2010. The prime is 314650 digits and currently enters the Top 5000 list at 295th place.
20 k's remain
Congratulations to Pilgrim and to everyone else participating.
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HAmstyVolunteer tester
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will there be any PSA Credit awarded for this effort?
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JohnHonorary cruncher
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will there be any PSA Credit awarded for this effort?
Yes, ESP is within the PSA.
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JohnHonorary cruncher
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Prime Found!!!
Another k eliminated: 219259*2^1300450+1 is prime! Found by Lennart (sm5ymt} on Thu Apr 29 09:02:01 2010. The prime is 391480 digits and currently enters the Top 5000 list at 188th place.
19 k's remain
Congratulations to Lennart and to everyone else participating.
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Nice! I look forward to the new sieve file. :) |
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Nice! I look forward to the new sieve file. :)
a new sievefile is done.
ESP3M_60T.abcd
In HFS
Lennart |
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JohnHonorary cruncher
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Prime Found!!!
Another k eliminated: 154801*2^1305084+1 is prime! Found by Roger (Pilgrim} on Thu Apr 29 23:45:44 2010. The prime is 392875 digits and currently enters the Top 5000 list at 187th place.
18 k's remain
Congratulations to Roger and to everyone else participating.
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Prime Found!!!
Another k eliminated: 250463*2^1316921+1 is prime! Found by Roger (Pilgrim} on Fri Apr 30 04:31:18 2010. The prime is 396439 digits and currently enters the Top 5000 list at 183rd place.
17 k's remain
Congratulations to Roger and to everyone else participating.
Lennart |
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stop it Roger .. leave some for the rest of us.. :p
but seriously.. keep up the good work.. |
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JohnHonorary cruncher
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stop it Roger .. leave some for the rest of us.. :p
OK Roger, you can start finding primes again. :)
After the early success, it looks like we've settled down into the stubbornness of this conjecture. Hopefully this will make the next prime, when found, that much more rewarding.
Thank you to all who continue to plug away with this search. Best of Luck!
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Развейте тему дальше. Интересно узнать подробности!!!
Полезный сайт! Все красиво сделано. |
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JohnHonorary cruncher
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stop it Roger .. leave some for the rest of us.. :p
OK Roger, you can start finding primes again. :)
After the early success, it looks like we've settled down into the stubbornness of this conjecture. Hopefully this will make the next prime, when found, that much more rewarding.
Thank you to all who continue to plug away with this search. Best of Luck!
Well, it's been over a year since the above post. Never did we anticipate the level of stubbornness of those primes. 17 k's still remain and the leading edge of the search is at n=2442152.
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The ESP stats showing still 20k left. Missed I something? |
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JohnHonorary cruncher
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The ESP stats showing still 20k left. Missed I something?
3 k's with primes made it accidentally into the last candidate upload. Notice that all 3 have "0 Count Untested" and "0 In Progress". Although the 120 tests combined were not necessary, we wanted to make sure people still received credit for crunching them.
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Sysadm@NbgVolunteer moderator
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the server
extended Sierpinski Problem
server=ESP:0:1:pgllr.mine.nu:9000
is down for a while ...
did I missed something?
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Sysadm@Nbg
my current lucky number: 113856050^65536 + 1
PSA-PRPNet-Stats-URL: http://u-g-f.de/PRPNet/
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the server
extended Sierpinski Problem
server=ESP:0:1:pgllr.mine.nu:9000
is down for a while ...
did I missed something?
Bump (I am curious why this is down also) |
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JohnHonorary cruncher
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the server
extended Sierpinski Problem
server=ESP:0:1:pgllr.mine.nu:9000
is down for a while ...
did I missed something?
The server has yet to be restarted from the server crash (25 Dec 2011). Sadly, it was catastrophic for this project. All data was lost. We've been piecing together what we can but it's not pretty. There's no sugar-coating this...it's a mess.
Probably what's on the mind of most people is "did I get my PSA credit?" YES, up to 15 minutes before the server crashed, all credit has been awarded...thanks in large part to your (Uli's) stats.
We have been able to gather info from a snapshot (21 Dec 2011) of where progress was and are planning to load the server based on that data. Therefore, we're looking at 4 days of lost work.
We hope to have the sever back up in the next few days. We apologize for the loss. :(
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rogueVolunteer developer
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We have been able to gather info from a snapshot (21 Dec 2011) of where progress was and are planning to load the server based on that data. Therefore, we're looking at 4 days of lost work.
We hope to have the sever back up in the next few days. We apologize for the loss. :(
If you know the users who crunched during that time, you might be able to get their prpclient logs to help eliminate some n from testing. |
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JohnHonorary cruncher
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We have been able to gather info from a snapshot (21 Dec 2011) of where progress was and are planning to load the server based on that data. Therefore, we're looking at 4 days of lost work.
If you know the users who crunched during that time, you might be able to get their prpclient logs to help eliminate some n from testing.
Looking at Uli's stats pages, we're now able to get status within 15 minutes of the crash. Only lost work now are those WU's that were pending.
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Sysadm@NbgVolunteer moderator
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We have been able to gather info from a snapshot (21 Dec 2011) of where progress was and are planning to load the server based on that data. Therefore, we're looking at 4 days of lost work.
If you know the users who crunched during that time, you might be able to get their prpclient logs to help eliminate some n from testing.
Looking at Uli's stats pages, we're now able to get status within 15 minutes of the crash. Only lost work now are those WU's that were pending.
the greatest honor for my work: it isnt useless at all ;-)
if you plan a restart at zero, please let me know: I will save the done work in the ancient port range
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Sysadm@Nbg
my current lucky number: 113856050^65536 + 1
PSA-PRPNet-Stats-URL: http://u-g-f.de/PRPNet/
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Michael GoetzVolunteer moderator
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The server has yet to be restarted from the server crash (25 Dec 2011). Sadly, it was catastrophic for this project. All data was lost. We've been piecing together what we can but it's not pretty. There's no sugar-coating this...it's a mess.
We have been able to gather info from a snapshot (21 Dec 2011) of where progress was and are planning to load the server based on that data. Therefore, we're looking at 4 days of lost work.
Losing 4 days of data is bad, but not catastrophic. Losing everything from the beginning would be catastrophic!
ESP hasn't been popular lately, so 4 days is not a whole lot of work. Fortunately. Or unfortunately. Depends on how you look at it, I guess.
Looks like my last ESP WUs were from about the 9th of December, so I don't have any missing results to share.
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JohnHonorary cruncher
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The server has yet to be restarted from the server crash (25 Dec 2011). Sadly, it was catastrophic for this project. All data was lost. We've been piecing together what we can but it's not pretty. There's no sugar-coating this...it's a mess.
We have been able to gather info from a snapshot (21 Dec 2011) of where progress was and are planning to load the server based on that data. Therefore, we're looking at 4 days of lost work.
Losing 4 days of data is bad, but not catastrophic. Losing everything from the beginning would be catastrophic!
We were only able to recover status...all data was lost, so specifically it was the crash that was catastrophic. n<100k residues and the candidate file are the only data remaining.
The project can survive with good integrity based on status 15 minutes prior to the crash. While it is unfortunate that there are no residues for 100k<n<2497279, it's not the end of the world. Should a DC effort begin in the future, rerunning the range without residues still returns a high confidence in the search space.
The search has resumed on a different server and port. Access can be gained here:
server=ESP:100:1:prpnet.mine.nu:13005 Uli will be moving the old stats to ancient ports and starting anew with this port. Only the primes table was moved over.
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Michael GoetzVolunteer moderator
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Ouch.
Do you want whatever residuals I have in logs?
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My lucky number is 75898524288+1 |
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JohnHonorary cruncher
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Do you want whatever residuals I have in logs?
Absolutely...some are better than none.
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Sysadm@NbgVolunteer moderator
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Uli will be moving the old stats to ancient ports and starting anew with this port. Only the primes table was moved over.
Done!
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Sysadm@Nbg
my current lucky number: 113856050^65536 + 1
PSA-PRPNet-Stats-URL: http://u-g-f.de/PRPNet/
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ESP port has been down for quite a while. |
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It is up now :)
Lennart |
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Ouch.
Do you want whatever residuals I have in logs?
Do you still need residuals? I have all the logs (test_results.log) since I started PRPnet. The problem is that old versions of the program didn't store the port name in the log, so I cannot just "fgrep ESP" .... (well, I found only a dozen of them this way, among 1,065). |
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Congratulations again Pooh_Bear, you are a lucky man.
16k left |
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Congratulations again Pooh_Bear, you are a lucky man.
Now if I were lucky in winning physical prizes that would be nice (like the lottery).
It has posted and ranked #78 overall. Two top 100 primes in under a month for my machines. I just set them up to do the work, but they sure are making big strides on PSA quickly. |
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rogueVolunteer developer
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Nice find!
BTW, the links in the first post of this thread are incorrect. I don't know who can update them. |
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Michael GoetzVolunteer moderator
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Nice find!
BTW, the links in the first post of this thread are incorrect. I don't know who can update them.
Yeah, the old server died and was replaced. Thanks for catching that. I'll go change the links...
Edit: Or not... Maybe Rytis can do it. I can't, at least not without a lot of effort and an "appendectomy through the nostril" type of approach. (I could hide this thread, create a new one, repost John's post with updated links, and move all the other posts in here to the new thread. That seems a bit ridiculous.)
If Rytis can't edit John's post, then I'll ask John if he can stop by and change it, but we'll need a long term fix for editing all of his topic-heading posts. They WILL need editing as time goes on.
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My lucky number is 75898524288+1 |
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Was the ESP I found not significant enough for an official announcement? It did come in as #78 overall on the top 5000. I am unsure if it's the largest ESP ever found, or any other factors about it.
Thanks. |
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Was the ESP I found not significant enough for an official announcement? It did come in as #78 overall on the top 5000. I am unsure if it's the largest ESP ever found, or any other factors about it.
Thanks.
Yepp, SR5 also down under, unfortunately. |
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Looks like the next prime was found on this port: 147559*2^2562218+1. Congrats@Pilgrim.
Regards Odi
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Michael GoetzVolunteer moderator
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Was the ESP I found not significant enough for an official announcement? It did come in as #78 overall on the top 5000. I am unsure if it's the largest ESP ever found, or any other factors about it.
Thanks.
It's significant -- it's just we've been transitioning everything that John used to do to other people. My apologies for this taking so long.
So, until the official announcement in the news category comes out, congratulations to both of you for the finds -- it's been about 2 years since the last ESP was found. I personally searched ESP a lot before the early records were lost in the crash, so I'm very excited about these two primes being found.
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My lucky number is 75898524288+1 |
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Scott BrownVolunteer moderator
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News announcement now posted. Apologies to Pooh Bear 27 and Pilgrim for the delay in getting this in the news.
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141941*2^4299438-1 is prime!
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I'm getting "[2012-04-29 10:06:07 EDT] prpnet.mine.nu:13005 connect to socket failed with error 61".
This is with
server=ESP:100:1:prpnet.mine.nu:13005
in the config file. All the other servers seem to be up.
Anyone else?
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The port seems down at the moment...
Regards Odi
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Hi,
it seems the page about the extended Sierpinski Problem in the PSA PRPNet Projects forum has not been updated. The last prime (147559*2^2562218+1) is not listed: here
Cheers,
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Badge Score: 1*5 + 8*6 + 8*7 + 3*8 + 1*9 = 142 |
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Michael GoetzVolunteer moderator
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Hi,
it seems the page about the extended Sierpinski Problem in the PSA PRPNet Projects forum has not been updated. The last prime (147559*2^2562218+1) is not listed: here
Cheers,
Corrected. Thanks for pointing out the ommission.
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My lucky number is 75898524288+1 |
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May I be slightly annoying.....
You forgot to remove the k from the list of remaining K and to update the number of remaining k.
....
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Badge Score: 1*5 + 8*6 + 8*7 + 3*8 + 1*9 = 142 |
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Michael GoetzVolunteer moderator
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May I be slightly annoying.....
You forgot to remove the k from the list of remaining K and to update the number of remaining k.
....
Not annoying at all, but I can't actually find anything wrong. I know I didn't update those, so I think someone else went and did the edit. If not (and I'm missing something), just let me know.
Thanks again,
Mike
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My lucky number is 75898524288+1 |
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Michael GoetzVolunteer moderator
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I just noticed that I might have found an ESP prime, as the log file on one of my hosts has the following entry:
[2012-10-23 06:20:34 CDT] Server: ESP, Candidate: k*2^n+1 Program: llr Residue: PRIME Time: 3886 seconds
and that pfgw64 has been running for the last eight hours to double check. Is it normal for pfgw64 to take this long?
Thanks,
Ardo
Ardo,
I hid your post and redacted the actual number in the quote above. It's best not display the number until the prime is reported to the prime pages.
Note that pfgw does NOT checkpoint, at least when doing *some* tests, so try not to interrupt it if at all possible.
Someone will correct me if I'm wrong, but I think pfgw is called to do Fermat divisor checks. I think those take longer than the actual primality test.
I vaguely recall something about commenting out the pfgw/pfgw64 lines in the ini file so that prpnet doesn't automatically do the divisor test. Or maybe that was with GFNs.
Whatever, assuming the prime isn't a computation error, CONGRATULATIONS!!!
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My lucky number is 75898524288+1 |
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rogueVolunteer developer
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Note that pfgw does NOT checkpoint, at least when doing *some* tests, so try not to interrupt it if at all possible.
Someone will correct me if I'm wrong, but I think pfgw is called to do Fermat divisor checks. I think those take longer than the actual primality test.
I vaguely recall something about commenting out the pfgw/pfgw64 lines in the ini file so that prpnet doesn't automatically do the divisor test. Or maybe that was with GFNs.
Whatever, assuming the prime isn't a computation error, CONGRATULATIONS!!!
pfgw does not checkpoint primality tests or GFN divisibility checks. It will checkpoint PRP tests. |
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I just noticed that I might have found an ESP prime, as the log file on one of my hosts has the following entry:
[2012-10-23 06:20:34 CDT] Server: ESP, Candidate: k*2^n+1 Program: llr Residue: PRIME Time: 3886 seconds
and that pfgw64 has been running for the last eight hours to double check. Is it normal for pfgw64 to take this long?
Thanks,
Ardo
Ardo,
I hid your post and redacted the actual number in the quote above. It's best not display the number until the prime is reported to the prime pages.
Note that pfgw does NOT checkpoint, at least when doing *some* tests, so try not to interrupt it if at all possible.
Someone will correct me if I'm wrong, but I think pfgw is called to do Fermat divisor checks. I think those take longer than the actual primality test.
I vaguely recall something about commenting out the pfgw/pfgw64 lines in the ini file so that prpnet doesn't automatically do the divisor test. Or maybe that was with GFNs.
Whatever, assuming the prime isn't a computation error, CONGRATULATIONS!!!
Thanks!
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Badge score: 2*5 + 8*7 + 3*8 + 3*9 + 1*10 + 1*11 + 1*13 = 151
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Michael GoetzVolunteer moderator
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It's officially posted on the server stats page now, so official congratulations are now in order!
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Michael GoetzVolunteer moderator
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...And added to the primes list.
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My lucky number is 75898524288+1 |
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