|
| |
|
|
A103463
|
|
Length of the largest left-truncatable prime (in base n).
|
|
3
|
|
|
|
0, 3, 6, 6, 17, 7, 15, 10, 24, 9, 32, 8, 26, 22, 25, 11, 43, 14, 37, 27, 37, 17, 53, 20, 39, 28, 46, 19
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
2,2
|
|
|
COMMENTS
|
The next term (base 30) will be difficult to calculate because there are over a trillion left-truncatable primes in that base for each of digit-lengths 29-34. Nevertheless, the largest left-truncatable prime in this base can be estimated by theory to have a length of about 82. [Hans Havermann, Aug 16 2011]
|
|
|
LINKS
|
Table of n, a(n) for n=2..29.
I. O. Angell and H. J. Godwin, On Truncatable Primes, Math. Comput. 31, 265-267, 1977.
Roman Maeder, A Prime Pencil
Eric Weisstein: Truncatable Prime.
Index entries for sequences related to truncatable primes
|
|
|
CROSSREFS
|
Cf. A076623, A103443.
Sequence in context: A269525 A341885 A036252 * A265026 A304335 A223048
Adjacent sequences: A103460 A103461 A103462 * A103464 A103465 A103466
|
|
|
KEYWORD
|
nonn,base
|
|
|
AUTHOR
|
Martin Renner, Mar 21 2005, Feb 20 2008, Apr 20 2008
|
|
|
EXTENSIONS
|
a(24)-a(29) from Hans Havermann, Aug 16 2011
|
|
|
STATUS
|
approved
|
| |
|
|
