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 statusMnStatusDetails143775607No known factors, not tested for primality TFNo factors below 278TF target 277 P-1B1 = 1250000B2 = 1326484500 HistoryDateUserTypeResult2025-06-04JacobZNFno factor from 2^77 to 2^782025-05-01S36049NFno factor from 2^76 to 2^772024-10-07Luke DurantNF-PM1B1=1250000, B2=13264845002019-11-07Franklin WebberNFno factor from 2^75 to 2^762019-11-07Franklin WebberNFno factor from 2^74 to 2^752019-11-07Franklin WebberNFno factor from 2^73 to 2^742019-11-07Franklin WebberNFno factor from 2^72 to 2^732017-02-21guruNFno factor from 2^71 to 2^722017-02-20ZacariazNFno factor from 2^70 to 2^712017-02-13JoDuNFno factor from 2^69 to 2^702016-04-18DerekNFno factor from 2^68 to 2^692016-03-31dbaughNFno factor from 2^67 to 2^682015-02-27aurashiftNFno factor from 2^66 to 2^672012-12-16sasaki3NFno factor from 2^65 to 2^662010-12-24RichardNFno factor from 2^64 to 2^652010-06-17Charles A. MorrisNFno factor from 2^63 to 2^64