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 statusMnStatusDetails130170013Composite: proven not-prime with PRP test TFNo factors below 277TF target 277 P-1B1 = 756000B2 = 69706098 PRPStatusDateUserResidueShiftTypeBaseVerified2024-09-11Sir Rutherford J. Pinkerton III3981B55B92F410349142730213Verified2025-03-04Mark Rose3981B55B92F410344088370013 HistoryDateUserTypeResult2025-03-04thunderCERTPRP CertificationCERT proof power = 10Proof certified good2025-03-04Mark RoseC-PRP3981B55B92F41034PRP proof power = 10PRP: VerifiedProof certified good2024-09-11George WoltmanCERTPRP CertificationCERT proof power = 8Cert good, Proof bad2024-09-11Luke DurantCERTPRP CertificationCERT proof power = 8Cert good, Proof bad2024-09-11Sir Rutherford J. Pinkerton IIIC-PRP3981B55B92F41034PRP proof power = 8PRP: VerifiedCert good, Proof bad2024-08-10R GiltrapNF-PM1B1=756000, B2=697060982023-06-20TheJudgerNFno factor from 2^76 to 2^772023-06-02ANONYMOUSNFno factor from 2^75 to 2^762022-12-04ViliamFNFno factor from 2^74 to 2^752021-02-07BlueBoxNFno factor from 2^73 to 2^742020-10-20SRBaseNFno factor from 2^72 to 2^732016-01-28-Anonymous-NFno factor from 2^71 to 2^722016-01-17workerthreadNFno factor from 2^70 to 2^712016-01-15workerthreadNFno factor from 2^69 to 2^702016-01-14workerthreadNFno factor from 2^68 to 2^692015-11-03SourceBinary.comNFno factor from 2^67 to 2^682015-01-17sasaki3NFno factor from 2^66 to 2^672012-10-09tscNFno factor from 2^65 to 2^662010-11-12Torchwood InstituteNFno factor from 2^64 to 2^652010-06-01Torchwood InstituteNFno factor from 2^63 to 2^64