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 |
| 72 | 106002730711768093638181225145334190436829099411377323338219454617008287 | A(276,2121) | 25e9 | 600346572 | 11 Sep 2017 | R. Propper |
| 70 | 2281545765135387055770463020534665082129848151230492922548825535349609 | 21563-1 | 1e10 | 234874783 | 08 Aug 2017 | R. Propper |
| 68 | 61491618977549042678155153540458255504752992030160252118535699943713 | 21471-1 | 850e6 | 1149118327 | 31 Aug 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 |
| 64 | 1011475887230582795346080875236878564683110543141027818703968639 | 21261-1 | 2.9e9 | 3998987271 | 11 Sep 2017 | R. Propper |
| 63 | 117166794471137237993098469105117594115732235942418044032585601 | 21437-1 | 2.9e9 | 877811894 | 09 Sep 2017 | R. Propper |
| 62 | 82246854728142924005776121999404351754306984763883228668451697 | 22566+1 | 1e9 | 2977144520 | 21 Feb 2017 | S. Wagstaff |
| 62 | 44095773952418313061376356885818832992331205443208761441942523 | 57197-1 | 43e6 | ??? | 31 May 2017 | C. Bouvier/P. Ochem |
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).
Please send an email to ``zimmerma [at] loria (dot) fr'' for any remark about this page.