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 statusMnStatusDetails152307139No known factors, not tested for primality TFNo factors below 278TF target 277 P-1B1 = 1315000B2 = 1412328720 HistoryDateUserTypeResult2025-08-17RichardNFno factor from 2^77 to 2^782025-01-29tomfrNFno factor from 2^76 to 2^772024-09-26Luke DurantNF-PM1B1=1315000, B2=14123287202024-08-04SRBaseNFno factor from 2^75 to 2^762023-02-08SRBaseNFno factor from 2^74 to 2^752021-11-15SRBaseNFno factor from 2^73 to 2^742017-11-03EratosthenesNFno factor from 2^72 to 2^732017-06-07Sergey NosovNFno factor from 2^71 to 2^722017-04-26megavinkNFno factor from 2^70 to 2^712017-04-05treborNFno factor from 2^69 to 2^702017-02-22enderhirodantezeusNFno factor from 2^68 to 2^692016-04-25rubikvn2100NFno factor from 2^67 to 2^682015-03-30tscNFno factor from 2^66 to 2^672013-01-23theSpirit83NFno factor from 2^65 to 2^662011-01-16Charles A. MorrisNFno factor from 2^64 to 2^652010-07-191997rj7NFno factor from 2^63 to 2^64