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 statusMnStatusDetails139921003Composite: proven not-prime with PRP test TFNo factors below 278TF target 277 P-1B1 = 1221000B2 = 1307713440 PRPStatusDateUserResidueShiftTypeBaseVerified2025-05-03Serge BatalovC26C866E995A9BD59900368313 HistoryDateUserTypeResult2025-05-03Peter_JakubCERTPRP CertificationCERT proof power = 10Proof certified good2025-05-03Serge BatalovC-PRPC26C866E995A9BD5PRP proof power = 10PRP: VerifiedProof certified good2025-03-18Serge BatalovNFno factor from 2^77 to 2^782024-09-24Luke DurantNF-PM1B1=1221000, B2=13077134402024-08-20Luke DurantNFno factor from 2^76 to 2^772024-07-21SRBaseNFno factor from 2^75 to 2^762023-01-16SRBaseNFno factor from 2^74 to 2^752021-09-28Neutron3529NFno factor from 2^73 to 2^742020-10-23SRBaseNFno factor from 2^72 to 2^732016-09-09Ilya AlexandrovNFno factor from 2^71 to 2^722016-09-08Smok_bmv NFno factor from 2^70 to 2^712016-08-31DerekNFno factor from 2^69 to 2^702016-08-31DerekNFno factor from 2^68 to 2^692016-08-16rubikvn2100NFno factor from 2^67 to 2^682015-02-12MucolNFno factor from 2^66 to 2^672012-11-26nextPrimeNFno factor from 2^65 to 2^662010-12-10RichardNFno factor from 2^64 to 2^652010-06-14-Anonymous-NFno factor from 2^63 to 2^64