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 statusMnStatusDetails142293497Composite: proven not-prime with PRP test TFNo factors below 277TF target 277 P-1B1 = 1219000B2 = 1382797680 PRPStatusDateUserResidueShiftTypeBaseVerified2025-05-20retroman46456EB9FFF076BFCC5760587513 HistoryDateUserTypeResult2025-05-20ChuckCERTPRP CertificationCERT proof power = 8Proof certified good2025-05-20retroman464C-PRP56EB9FFF076BFCC5PRP proof power = 8PRP: VerifiedProof certified good2024-10-02Luke DurantNF-PM1B1=1219000, B2=13827976802024-09-25Ryan PropperNFno factor from 2^76 to 2^772024-07-17SRBaseNFno factor from 2^75 to 2^762023-01-21SRBaseNFno factor from 2^74 to 2^752021-11-06SRBaseNFno factor from 2^73 to 2^742020-10-25SRBaseNFno factor from 2^72 to 2^732016-07-18guruNFno factor from 2^71 to 2^722016-07-18guruNFno factor from 2^70 to 2^712016-07-17Choi4KANGNFno factor from 2^69 to 2^702016-06-05Choi4KANGNFno factor from 2^68 to 2^692016-03-25dbaughNFno factor from 2^67 to 2^682015-02-23aurashiftNFno factor from 2^66 to 2^672012-12-08AKAxAutoNFno factor from 2^65 to 2^662010-12-20RichardNFno factor from 2^64 to 2^652010-06-16sasaki3NFno factor from 2^63 to 2^64