Exponent Range: to+ above minimum exponent Include full ECM history (every "NF-ECM" result, slow) Include expired assignments Show software version in historyGet statusMnDetails42501847Composite: proven not-prime with Lucas-Lehmer testNo factors below 273TF target 272P-1B1 = 475000B2 = 7006250LLStatusDateUserResidueShiftSoftwareVerified2008-08-07arnaud515AB115ECEC68A239566494Windows,Prime95,v24 final,(aka Wc1)Verified2018-01-17Dubslow515AB115ECEC68A234562613Linux 64-bit,Prime95,v28.7,build 1HistoryDateUserTypeResult2020-07-06Sid & AndyNFno factor TF: 72-732018-01-17DubslowC-LL515AB115ECEC68A22015-08-27-anonymous-NFno factor TF: 71-722015-03-03Mark RoseNFno factor TF: 70-712015-02-23BdotNFno factor TF: 69-702014-01-03LaurVNFno factor TF: 68-692008-08-07arnaudC-LL515AB115ECEC68A22008-07-04arnaudNF-PM1B1=475000, B2=70062502007-06-15clemsonNFno factor TF: 1-68