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:





MnDetails
2236457
Composite, with 3 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 262
Factored
FactorDigitsBitsDate
890109887929.7old
89051915763111343.02008-09-30 14:36:42
1975535991601118781650172477.42025-03-22 08:44:12
ECM
DigitsB1Curves
2550000156 / 280
Estimated T-Level: 22.8 ⓘ
TF below 2^71 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Factored
PRP without proof (not generated)
2017-10-10Oliver Kruse9494BC1D6D9484982013
Factored
PRP without proof (not generated)
2017-11-20kkmrkkblmbrbk9494BC1D6D9484982111363713
Verified
Certified Good
2025-03-22Daniil Tsarkov93170FF10B4B50AB3122509653
History
DateUserTypeResult
2025-03-22stenleiCERT
Proof certified good
2025-03-22Daniil TsarkovC-PRP
Proof Certified Good

Proof Power: 7

2025-03-22Daniil TsarkovF-ECMFactor: 197553599160111878165017 / ECM curve 15, B1=90150, B2=459443985, Edwards Sigma=1452367569862819
2021-06-30Dylan DelgadoNF-PM1B1=1000000, B2=106000000
2017-11-20kkmrkkblmbrbkC-PRPM2236457/890109887/8905191576311 : 9494BC1D6D948498
2017-10-10Oliver KruseC-PRPM2236457/890109887/8905191576311 : 9494BC1D6D948498
2016-04-19alpertronNF-PM1B1=500000, B2=15000000, E=12
2008-09-30markrFFactor: 8905191576311