Exponent Range: to+ above minimum exponent Output results in HTML format Output results in text-only format Output results in plain-text format Show full details (current assignment, history, LL residues) Include full ECM history (every "NF-ECM" result, slow) Include ancient history logs (1997-2007, slow) Include expired assignments Show software version in historyGet statusMnStatusDetails137813483Composite: proven not-prime with PRP test TFNo factors below 277TF target 277 P-1B1 = 680000B2 = 31355730 PRPStatusDateUserResidueShiftTypeBaseVerified2025-05-03curtiscBD4A02A8874417ED1478964513 HistoryDateUserTypeResult2025-05-04Jonathan WebbCERTPRP CertificationCERT proof power = 8Proof certified good2025-05-03curtiscC-PRPBD4A02A8874417EDPRP proof power = 8PRP: VerifiedProof certified good2024-09-18Ryan PropperNF-PM1B1=680000, B2=313557302024-07-25RichardNFno factor from 2^76 to 2^772024-07-16SRBaseNFno factor from 2^75 to 2^762023-01-13SRBaseNFno factor from 2^74 to 2^752021-08-02SRBaseNFno factor from 2^73 to 2^742020-10-23SRBaseNFno factor from 2^72 to 2^732016-07-24DerekNFno factor from 2^71 to 2^722016-07-24Choi4KANGNFno factor from 2^70 to 2^712016-06-12Choi4KANGNFno factor from 2^69 to 2^702016-05-15Choi4KANGNFno factor from 2^68 to 2^692016-03-02dbaughNFno factor from 2^67 to 2^682015-02-11tscNFno factor from 2^66 to 2^672012-11-16RichardNFno factor from 2^65 to 2^662010-12-01Torchwood InstituteNFno factor from 2^64 to 2^652010-06-15riemannbNFno factor from 2^63 to 2^64