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 statusMnStatusDetails137665883Composite: proven not-prime with PRP test TFNo factors below 277TF target 277 P-1B1 = 676000B2 = 31393950 PRPStatusDateUserResidueShiftTypeBaseVerified2025-04-21George Woltman27A25F0584D99F9C013 HistoryDateUserTypeResult2025-04-21COMPUTRON9001CERTPRP CertificationCERT proof power = 10Proof certified good2025-04-21George WoltmanC-PRP27A25F0584D99F9CPRP proof power = 10PRP: VerifiedProof certified good2024-09-18Ryan PropperNF-PM1B1=676000, B2=313939502024-07-21tbusbyNFno factor from 2^76 to 2^772024-07-13SRBaseNFno factor from 2^75 to 2^762023-01-12SRBaseNFno factor from 2^74 to 2^752021-07-31SRBaseNFno factor from 2^73 to 2^742020-10-23SRBaseNFno factor from 2^72 to 2^732016-11-19Andrew BNFno factor from 2^71 to 2^722016-11-13proxy2222NFno factor from 2^70 to 2^712016-05-15Ryan PropperNFno factor from 2^69 to 2^702016-05-15Choi4KANGNFno factor from 2^68 to 2^692016-03-02dbaughNFno factor from 2^67 to 2^682015-02-05vwflat4NFno factor from 2^66 to 2^672012-11-13tscNFno factor from 2^65 to 2^662010-12-02RichardNFno factor from 2^64 to 2^652010-06-15Carsten KossendeyNFno factor from 2^63 to 2^64