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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