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 statusMnStatusDetails138622207Composite: proven not-prime with PRP test TFNo factors below 277TF target 277 P-1B1 = 1160000B2 = 1138773900 PRPStatusDateUserResidueShiftTypeBaseVerified2025-08-10Mihai Preda91B7FD8D74173518013 HistoryDateUserTypeResult2025-08-11ViKiCERTPRP CertificationCERT proof power = 10Proof certified good2025-08-10Mihai PredaC-PRP91B7FD8D74173518PRP proof power = 10PRP: VerifiedProof certified good2024-09-20Luke DurantNF-PM1B1=1160000, B2=11387739002024-08-02Luke DurantNFno factor from 2^76 to 2^772024-07-14SRBaseNFno factor from 2^75 to 2^762023-01-13SRBaseNFno factor from 2^74 to 2^752021-08-02SRBaseNFno factor from 2^73 to 2^742020-10-26SRBaseNFno factor from 2^72 to 2^732017-02-12XZTNFno factor from 2^71 to 2^722017-02-12guruNFno factor from 2^70 to 2^712017-02-11proxy2222NFno factor from 2^69 to 2^702017-01-10proxy2222NFno factor from 2^68 to 2^692016-03-02dbaughNFno factor from 2^67 to 2^682015-02-08Karol TNFno factor from 2^66 to 2^672012-11-23Novak MartonNFno factor from 2^65 to 2^662010-12-03Thomas StorkNFno factor from 2^64 to 2^652010-06-12Jud McCranieNFno factor from 2^63 to 2^64