The ECMNET Project

June 2017: Cyril Bouvier has developped a program named ecmpi to run GMP-ECM on several nodes using MPI.
11 October 2016: GMP-ECM 7.0.4 has been released.
25 Apr 2013: using GMP-ECM, Andrew R. Booker, Ghaith A. Hiary, and Jon P. Keating showed that RSA-210 is not squarefull (details)

Results so far. Here are the (up to) 10 largest factors (of at least 60 digits) found by ECM so far in 2023 (see also the all-times top-50 table, and the top ten from 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021), 2022):

digits	factor	from	B1	sigma	date	who
67	7118712195058078015963765386322444134285243628705404423063643507397	2²²²²+1	7.6e9	14995362013351480992	07 Jan 2023	S. Bonzanini

ECMNET Newsletters: number 1 (13 Feb 1998), number 2 (15 Mar 1998), number 3 (17 Apr 1998), number 4 (15 May 1998), number 5 (18 June 1998), number 6 (15 July 1998), number 7 (17 August 1998), number 8 (17 September 1998), number 9 (16 October 1998), number 10 (23 November 1998), number 11 (17 December 1998), number 12 (19 April 1999), number 13 (16 December 1999).

Please send an email to ``zimmerma [at] loria (dot) fr'' for any remark about this page.

visitors since July 1, 1999