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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Exponent Range:










MnStatusDetails
18824653Factored
FactorDigitsBitsDate
12743832753695947326312270.12019-07-20 21:27:45
ECM
DigitsB1Curves
25500001 / 280
Estimated T-Level: 20.0 ⓘ
TF below 2^61 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2006-01-15Ars Technica Team Prime RibF5A6B03690E4D45E11795540
Verified (Factored)2007-02-05Ars Technica Team Prime RibF5A6B03690E4D45E29084
Verified (Factored)2015-05-21wombatmanF5A6B03690E4D45E9419461
P-1 factors
DateFactorB1B2
2019-07-2012743832753695947326313750007968750
History
DateUserTypeResult
2019-07-20James HeinrichF-PM1
Factor: 1274383275369594732631 / (P-1, B1=375000, B2=7968750, E=12)
2015-08-30ramgeisNF
no factor from 2^69 to 2^70
2015-05-21wombatmanC-LL
F5A6B03690E4D45E
2015-03-19NRNF
no factor from 2^68 to 2^69
2015-03-19NRNF
no factor from 2^67 to 2^68
2014-08-02NesowaNF
no factor from 2^66 to 2^67