Exponent Range: to+ above minimum exponent Include full ECM history (every "NF-ECM" result, slow) Include expired assignments Show software version in historyGet statusMnDetails42391309Composite: proven not-prime with Lucas-Lehmer testNo factors below 274TF target 272P-1B1 = 505000B2 = 13635000LLStatusDateUserResidueShiftSoftwareBad2008-05-10Neil Kirkland3590D5F3CB09EDE032590589Windows,Prime95,v24 final,(aka Wc1)Verified2015-10-09George Woltman4E001B2739854B0029218100Mac OS X 64-bit,Prime95,v28.7,build 1Verified2016-09-16Mark Rose4E001B2739854B001245131Linux 64-bit,Prime95,v28.9,build 2HistoryDateUserTypeResult2020-01-10-anonymous-NFno factor TF: 73-742019-10-04-anonymous-NFno factor TF: 72-732016-09-16Mark RoseC-LL4E001B2739854B002015-10-09George WoltmanC-LL4E001B2739854B002015-07-28GregNFno factor TF: 71-722015-03-25Mark RoseNFno factor TF: 70-712015-02-07chalsallNFno factor TF: 69-702014-03-04LaurVNFno factor TF: 68-692008-05-10-anonymous-C-LL3590D5F3CB09EDE02008-03-22-anonymous-NF-PM1B1=505000, B2=136350002007-07-24tscNFno factor TF: 1-68