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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 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 2617995921130540203511836948324558207460638524770877665327216483793459 3683-1 7.6e9 1162145500 13 Oct 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
66 112114237626279005145204233646457328838633247887176899247572680743 21219-1 10e9 1212636279 18 Oct 2017 R. Propper
64 8612055962441945623327451972844118959199682536269165337730366471 21463-1 7.6e9 3357119880 24 Sep 2017 R. Propper
64 1011475887230582795346080875236878564683110543141027818703968639 21261-1 2.9e9 3998987271 11 Sep 2017 R. Propper

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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