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 statusMnStatusDetails153313339No known factors, not tested for primality TFNo factors below 278TF target 277 P-1B1 = 1181000B2 = 591713850 HistoryDateUserTypeResult2025-07-31La GüiraNFno factor from 2^77 to 2^782025-02-19OdicinNF-PM1B1=1181000, B2=5917138502025-01-01PhantomasNFno factor from 2^76 to 2^772024-08-07SRBaseNFno factor from 2^75 to 2^762023-02-14SRBaseNFno factor from 2^74 to 2^752021-11-30SRBaseNFno factor from 2^73 to 2^742016-11-25La GüiraNFno factor from 2^72 to 2^732016-11-25La GüiraNFno factor from 2^71 to 2^722016-09-08Choi4KANGNFno factor from 2^70 to 2^712016-08-05La GüiraNFno factor from 2^69 to 2^702016-08-05La GüiraNFno factor from 2^68 to 2^692016-04-27James HintzNFno factor from 2^67 to 2^682015-04-03tscNFno factor from 2^66 to 2^672013-01-26tscNFno factor from 2^65 to 2^662011-01-19benthomasNFno factor from 2^64 to 2^652010-06-25Lars FrickeNFno factor from 2^63 to 2^64