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Results so far. Here are the (up to) 10 largest factors (of at least 58 digits) found by ECM so far in 2019 (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):

digits factor from B1 sigma date who
67 1313315094055212394284903732212842496630864861056355867697962566297 8339-3339 1e9 1:4209044952 24 Jan 2019 B. Silverman
66 280061638596737698617611605866011216047530170059861959485907358033 527973-1 850e6 12094509725059003198 25 Jan 2019 yoyo@home/hamza
64 6413277742755528723330810386041589576639627895487112509118767663 8327-7327 1e9 1:3563559151 14 Feb 2019 B. Silverman
64 2734512662636062290789829745829487543452442766722691471124090457 9301-2301 110e6 17797304881663374278 20 Jan 2019 yoyo@home/Mik
64 2293634348705513670905595104865427131916738346648381332934751649 A(829332,3680) 850e6 ??? 24 Feb 2019 yoyo@home/chapman
64 1096221689473668741885320079498807903080025340837128557919390251 21087+1 850e6 10607233473763394393 12 Apr 2019 yoyo@home/Nabz37
63 748028517725132090069715393933335927013140590291300811353201607 12259+7259 110e6 11851376051238899803 07 Jan 2019 yoyo@home/Deltik
63 431976845825037950811420051124195803685505823070528958011405097 900*12900-1 260e6 6392782589746338709 06 May 2019 yoyo@home/TomTurbo
62 66747193058349253980250138299492944283449631375464079700189511 22357-1 260e6 12645046869486715227 05 Apr 2019 R. Propper
62 13343980770108587911128491083409673555201116699244409741363729 9274+5274 110e6 13791685222291130372 27 Apr 2019 yoyo@home/Deltik

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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