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News:

Results so far. Here are the (up to) 10 largest factors found by ECM so far this year (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):

digits factor from B1 sigma date who
6726063244933035320536082894305280640748217227301673009199909852396233671-1400e6311299334928 Jan 2015B. Dodson
6637440462302411876899340652364830698608196553323888170831202141815111325+1400e6212541726322 Feb 2015B. Dodson
66171392487475854562743889929898648257427965285180928044372842369069412*5412+1110e6169382385518 Jan 2015R. Hooft
638748293995076371016408595489066974541218043033271282210236958617373-1400e6196072485209 Jan 2015B. Dodson
6371507984186448657279855038902524277323322301354506444504312447121213-11e9420669248409 Apr 2015R. Propper
63233251051796735303435945853130413114396762481489890652559653193934361-143e6107834640710 Feb 2015W. Lipp
5514470392229840893344198498897672746691041400746508111031058961-1110e6383219167007 Mar 2015yoyo@home/zioriga
54223888145433163128588378773539598664530236060382826677101243-111e6268309908701 Apr 2015K. Beschorner
542200181741841108674503597886715005089131526766810229831000*81000+1110e6282547703816 Mar 2015yoyo@home/Smetchewit
5398125109076746253749165631982092878222319191117194933718*10235-73e6344489952309 Jan 2015S. Batalov

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).


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