Exponent Range: to+ above minimum exponent Include full ECM history (every "NF-ECM" result, slow) Include expired assignments Show software version in historyGet statusMnDetails332328389Composite: proven not-prime with PRP testNo factors below 281TF target 281P-1B1 = 2980000B2 = 81205000PRPStatusProofDateUserResidueShiftTypeBaseVerifiedCertified GoodPower=112025-10-25Matthew Buckingham-Bishop8291300A179C82E8013HistoryDateUserTypeResult2025-10-25Fabrice BelletCERTProof certified good2025-10-25Matthew Buckingham-BishopC-PRP8291300A179C82E8 Proof Certified Good Proof Power: 112024-02-21Grant McCrackenNFno factor TF: 68-692023-10-18James HeinrichNFno factor TF: 67-682023-01-29Mark RoseNFno factor TF: 80-812023-01-29Mark RoseNFno factor TF: 79-802022-11-18Runtime ErrorNFno factor TF: 78-792016-05-21aurashiftNF-PM1B1=2980000, B2=81205000, E=62016-04-18VictordeHollanderNFno factor TF: 77-782016-04-18VictordeHollanderNFno factor TF: 76-772016-04-12Team_InspectorNFno factor TF: 75-762014-04-20Preben SNFno factor TF: 74-752013-12-29Team_InspectorNFno factor TF: 73-742013-01-17LaurVNFno factor TF: 72-732012-06-11Grant McCrackenNFno factor TF: 71-722011-04-22Grant McCrackenNFno factor TF: 70-712010-12-16SunfishNFno factor TF: 69-702010-03-28Grant McCrackenNFno factor TF: 68-69