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 statusMnStatusDetails138037997Composite: proven not-prime with PRP test TFNo factors below 277TF target 277 P-1B1 = 676000B2 = 31660650 PRPStatusDateUserResidueShiftTypeBaseVerified2025-05-19George Woltman444D39B2FE80D1C3013 HistoryDateUserTypeResult2025-05-19ZhiYuanCERTPRP CertificationCERT proof power = 10Proof certified good2025-05-19George WoltmanC-PRP444D39B2FE80D1C3PRP proof power = 10PRP: VerifiedProof certified good2024-09-19Ryan PropperNF-PM1B1=676000, B2=316606502024-07-29Luke DurantNFno factor from 2^76 to 2^772024-07-14SRBaseNFno factor from 2^75 to 2^762023-01-21SRBaseNFno factor from 2^74 to 2^752021-08-02SRBaseNFno factor from 2^73 to 2^742020-10-28SRBaseNFno factor from 2^72 to 2^732016-03-17Ready4PrimeTimeNFno factor from 2^71 to 2^722016-02-24Ready4PrimeTimeNFno factor from 2^70 to 2^712014-12-28La GüiraNFno factor from 2^69 to 2^702014-12-28La GüiraNFno factor from 2^68 to 2^692014-12-28La GüiraNFno factor from 2^67 to 2^682014-12-12snme2pm1NFno factor from 2^66 to 2^672012-11-15subgeniusNFno factor from 2^65 to 2^662010-12-10ThaNFno factor from 2^64 to 2^652010-06-21RichardNFno factor from 2^63 to 2^64