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
2276171
Composite, with 2 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 262
Factored
FactorDigitsBitsDate
40971079825.3old
61184746037136971652.42014-08-09 10:35:57
ECM
DigitsB1Curves
2550000280 / 280
30250000119 / 640
Estimated T-Level: 25.9 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Verified
PRP without proof (not generated)
2017-10-11Oliver Kruse79B80871B44610182013
Verified
PRP without proof (not generated)
2017-11-21storm551079B80871B44610182116558213
History
DateUserTypeResult
2017-11-21storm5510C-PRPM2276171/40971079/6118474603713697 : 79B80871B4461018
2017-10-11Oliver KruseC-PRPM2276171/40971079/6118474603713697 : 79B80871B4461018
2016-04-06alpertronNF-PM1B1=500000, B2=15000000, E=12
2014-08-09-anonymous-FFactor: 6118474603713697