Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
Fermat F26Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
768611241164811446.11963
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001251 / 1566
Estimated T-Level: 34.0
TF below 2^108 is very unlikely to find new factors due to ECM effort.
Assigned
AssignedUserWork TypeStage% DoneUpdatedExpired
2024-12-13Bommerfactor ECM smallC1S126.75 % 2024-12-17
2024-12-13lmaovertigofactor ECM small0.00 % 2024-12-13
2024-11-11pjmathematicianfactor ECM small0.00 % 2024-11-11
History
DateUserTypeResult
2021-04-27ATHNF-PP1
Start=6/5, B1=2000000, B2=150000000
2021-04-25ATHNF-PP1
Start=2/7, B1=1000000, B2=100000000
2015-06-11Jacques MOLNEF-ECM
Factor: 76861124116481 / (ECM curve 1, B1=250000, B2=25000000)
2008-11-30alan145F-ECM
Factor: 76861124116481
2008-11-27alan145F-ECM
Factor: 76861124116481