Results so far. Here are the (up to) 10 largest factors (of at least 60 digits) found by ECM so far in 2017 (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):
| digits | factor | from | B1 | sigma | date | who |
| 79 | 6083324092478900951288520916966416595449236017004455695358667500798143293692091 | A(276,2063) | 7.6e9 | 3761504459 | 14 July 2017 | R. Propper |
| 68 | 10668670230000179802365738756155613324642694467793437268722465236229 | 22246+1 | 1e9 | 1:736878906 | 11 Apr 2017 | S. Wagstaff |
| 66 | 430290068517717503314541569581514324311872414409341453561896330801 | 10730+1 | 850e6 | 1:3948033333 | 13 May 2017 | yoyo@home/Pulsar2017 |
| 62 | 82246854728142924005776121999404351754306984763883228668451697 | 22566+1 | 1e9 | 2977144520 | 21 Feb 2017 | S. Wagstaff |
| 62 | 44095773952418313061376356885818832992331205443208761441942523 | 57197-1 | 43e6 | ??? | 31 May 2017 | C. Bouvier/P. Ochem |
| 61 | 8164889805692762476297757873090780473989750955045866494742961 | 886*5886-1 | 11e6 | 1:2068124277 | 21 May 2017 | R. Hooft |
| 61 | 4073334782976241614987382168853459236198534017674709773325179 | P92#-1 | 110e6 | 3:2497578024 | 23 May 2017 | T. Nohara |
| 61 | 1144145266454516489033856771210558013734273396016810889657653 | 676*7676-1 | 260e6 | ??? | 14 May 2017 | yoyo@home/Ralfy |
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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