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 statusMnStatusDetails151402841No known factors, not tested for primality TFNo factors below 278TF target 277 P-1B1 = 1308000B2 = 1392979830 HistoryDateUserTypeResult2025-09-06Yu ZhuNFno factor from 2^77 to 2^782025-02-12StefanSkuNFno factor from 2^76 to 2^772024-09-22Luke DurantNF-PM1B1=1308000, B2=13929798302024-08-03SRBaseNFno factor from 2^75 to 2^762023-02-06SRBaseNFno factor from 2^74 to 2^752021-11-14SRBaseNFno factor from 2^73 to 2^742017-01-24XolotlNFno factor from 2^72 to 2^732017-01-23Simon HarrisonNFno factor from 2^71 to 2^722017-01-22La GüiraNFno factor from 2^70 to 2^712016-06-21Adam BuranNFno factor from 2^69 to 2^702016-06-19Adam BuranNFno factor from 2^68 to 2^692016-04-19rubikvn2100NFno factor from 2^67 to 2^682015-04-02RichardNFno factor from 2^66 to 2^672013-01-22RichardNFno factor from 2^65 to 2^662011-01-14Charles A. MorrisNFno factor from 2^64 to 2^652010-06-23Charles A. MorrisNFno factor from 2^63 to 2^64