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 statusMnStatusDetails147115627Composite: proven not-prime with PRP test TFNo factors below 278TF target 277 P-1B1 = 1215000B2 = 1354629870 PRPStatusDateUserResidueShiftTypeBaseVerified2025-02-01GdS7A5F68D1993514B4013 HistoryDateUserTypeResult2025-02-01Jonathan WebbCERTPRP CertificationCERT proof power = 10Proof certified good2025-02-01GdSC-PRP7A5F68D1993514B4PRP proof power = 10PRP: VerifiedProof certified good2024-10-25Luke DurantNF-PM1B1=1215000, B2=13546298702024-10-08Luke DurantNFno factor from 2^77 to 2^782024-08-03Yves de WandelaarNFno factor from 2^76 to 2^772024-07-28tscNFno factor from 2^75 to 2^762023-02-11SRBaseNFno factor from 2^74 to 2^752021-11-12SRBaseNFno factor from 2^73 to 2^742020-10-27SRBaseNFno factor from 2^72 to 2^732017-09-10symalladNFno factor from 2^71 to 2^722017-03-04airbreatherNFno factor from 2^70 to 2^712017-02-26JoDuNFno factor from 2^69 to 2^702016-12-02nate.andersNFno factor from 2^68 to 2^692016-03-18DerekNFno factor from 2^67 to 2^682015-03-08OS1NFno factor from 2^66 to 2^672013-04-30c10ck3rNFno factor from 2^65 to 2^662011-01-01sasaki3NFno factor from 2^64 to 2^65