Exponent Range: to+ above minimum exponent Include full ECM history (every "NF-ECM" result, slow) Include expired assignments Show software version in historyGet statusMnDetails332328571Composite: proven not-prime with PRP testNo factors below 281TF target 281P-1B1 = 2000000B2 = 227648190PRPStatusProofDateUserResidueShiftTypeBaseVerifiedCertified GoodPower=112025-11-15Matthew Buckingham-Bishop53E72BEB81A889D5013HistoryDateUserTypeResult2025-11-15Georg_EdelmannCERTProof certified good2025-11-15Matthew Buckingham-BishopC-PRP53E72BEB81A889D5 Proof Certified Good Proof Power: 112024-02-21Grant McCrackenNFno factor TF: 68-692023-10-18James HeinrichNFno factor TF: 67-682023-03-02JacobZNF-PM1B1=2000000, B2=2276481902023-01-29Mark RoseNFno factor TF: 80-812023-01-29Mark RoseNFno factor TF: 79-802022-09-01Team_InspectorNFno factor TF: 78-792021-05-24Jon PaceNFno factor TF: 77-782019-07-21ANONYMOUSNFno factor TF: 76-772019-04-17MadPoo 🙂NF-PM1B1=1000002016-03-10Team_InspectorNFno factor TF: 75-762014-04-20Preben SNFno factor TF: 74-752014-01-03Team_InspectorNFno factor TF: 73-742013-01-18LaurVNFno factor TF: 72-732012-06-21Grant McCrackenNFno factor TF: 71-722011-04-26Grant McCrackenNFno factor TF: 70-712010-12-17SunfishNFno factor TF: 69-702010-04-01Grant McCrackenNFno factor TF: 68-69