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 statusMnStatusDetails158168359No known factors, not tested for primality TFNo factors below 278TF target 278 P-1B1 = 955000B2 = 91893186 HistoryDateUserTypeResult2025-06-15RichardNFno factor from 2^77 to 2^782025-05-31Kyle AskineNFno factor from 2^76 to 2^772024-10-06Ryan PropperNF-PM1B1=955000, B2=918931862024-08-22SRBaseNFno factor from 2^75 to 2^762023-02-26SRBaseNFno factor from 2^74 to 2^752021-11-21SRBaseNFno factor from 2^73 to 2^742018-05-14eziocmNFno factor from 2^72 to 2^732017-11-13Oliver KruseNFno factor from 2^71 to 2^722017-11-10Hanzhi ZhouNFno factor from 2^70 to 2^712016-09-02La GüiraNFno factor from 2^69 to 2^702016-09-02La GüiraNFno factor from 2^68 to 2^692016-05-12ANONYMOUSNFno factor from 2^67 to 2^682015-04-23tscNFno factor from 2^66 to 2^672013-02-13sasaki3NFno factor from 2^65 to 2^662011-01-29Mr-PlonkNFno factor from 2^64 to 2^652010-06-27Charles A. MorrisNFno factor from 2^63 to 2^64