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 statusMnStatusDetails140933521Composite: proven not-prime with PRP test TFNo factors below 277TF target 277 P-1B1 = 1028000B2 = 353909010 PRPStatusDateUserResidueShiftTypeBaseVerified2025-08-15Yu ZhuE91EFEA222425EA0013 HistoryDateUserTypeResult2025-08-15Fabrice BelletCERTPRP CertificationCERT proof power = 10Proof certified good2025-08-15Yu ZhuC-PRPE91EFEA222425EA0PRP proof power = 10PRP: VerifiedProof certified good2024-09-30Luke DurantNF-PM1B1=1028000, B2=3539090102024-09-09Ryan PropperNFno factor from 2^76 to 2^772024-02-19tscNFno factor from 2^75 to 2^762023-01-19SRBaseNFno factor from 2^74 to 2^752021-10-11Neutron3529NFno factor from 2^73 to 2^742020-10-26SRBaseNFno factor from 2^72 to 2^732016-10-07nate.andersNFno factor from 2^71 to 2^722016-03-25dbaughNFno factor from 2^70 to 2^712015-05-14Judge HaleNFno factor from 2^69 to 2^702015-05-14Judge HaleNFno factor from 2^68 to 2^692015-05-14Judge HaleNFno factor from 2^67 to 2^682015-02-17vwflat4NFno factor from 2^66 to 2^672012-12-01nextPrimeNFno factor from 2^65 to 2^662010-12-12Architects CubedNFno factor from 2^64 to 2^652010-06-14Jonathan A ZylstraNFno factor from 2^63 to 2^64