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 statusMnStatusDetails151453613No known factors, not tested for primality TFNo factors below 278TF target 277 P-1B1 = 926000B2 = 91567350 HistoryDateUserTypeResult2025-09-05Section 31NFno factor from 2^77 to 2^782025-02-15La GüiraNFno factor from 2^76 to 2^772024-12-04Ryan PropperNF-PM1B1=926000, B2=915673502024-08-03SRBaseNFno factor from 2^75 to 2^762023-02-06SRBaseNFno factor from 2^74 to 2^752021-11-13SRBaseNFno factor from 2^73 to 2^742017-10-28Choi4KANGNFno factor from 2^71 to 2^722017-09-20Earle LoweNFno factor from 2^72 to 2^732017-09-19JerryNFno factor from 2^71 to 2^722017-01-03Johan ViljoenNFno factor from 2^70 to 2^712016-12-17airbreatherNFno factor from 2^69 to 2^702016-12-17airbreatherNFno factor from 2^68 to 2^692016-04-20RDbrvnNFno factor from 2^67 to 2^682015-03-24HBendtzNFno factor from 2^66 to 2^672013-01-21Nathan EdingtonNFno factor from 2^65 to 2^662011-01-14Damian SilvestreNFno factor from 2^64 to 2^652010-06-23sasaki3NFno factor from 2^63 to 2^64