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Results so far. Here are the (up to) 10 largest factors (of at least 60 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
73 2373524441444440625994123521138220202539745927415448738773239691983051831 22671-1 850e6 13934981232263533235 26 Jul 2019 R. Propper
69 959110413890396663952548923894410856346345954837742800970387131883487 A(552,1141) 43e6 1:2264856187 03 Nov 2019 P. Zimmermann
67 3006933064667765415004782045946139486212069786114683382403952373549 22386+1 1.5e9 1:916530022 27 Sep 2019 S. Wagstaff
67 1629003359251686824202558183443058761651451774395858285902643740187 14999+99149 110e6 0:7776816685081661783 04 Oct 2019 yoyo@home/Peter Baetz
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

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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