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
3156227Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
98640407251918011653.1old
ECM
DigitsB1Curves
255000054 / 280
Estimated T-Level: 21.0 ⓘ
TF below 2^65 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-31Oliver KruseAFEA0846BBA9831D193148253
Verified2017-12-13kkmrkkblmbrbkAFEA0846BBA9831D147387153
History
DateUserTypeResult
2022-03-24LordJuliusNF
no factor from 2^66 to 2^67
2022-03-24LordJuliusNF
no factor from 2^65 to 2^66
2022-02-22JossNF-PM1
B1=1000000, B2=128282700
2021-07-05JossNF
no factor from 2^67 to 2^68
2021-01-11JossNF
no factor from 2^64 to 2^65
2021-01-07JossNF
no factor from 2^63 to 2^64
2021-01-06JossNF
no factor from 2^62 to 2^63
2021-01-06JossNF-PM1
B1=315622, B2=3156227, E=6
2021-01-05JossNF-PM1
B1=315622
2021-01-04JossNF
no factor from 2^61 to 2^62
2021-01-04JossNF
no factor from 2^60 to 2^61
2021-01-02JossNF-PM1
B1=157811
2017-12-13kkmrkkblmbrbkC-PRP
M3156227/9864040725191801 : AFEA0846BBA9831D
PRP: Verified
PRP without proof (not generated)
2017-10-31Oliver KruseC-PRP
M3156227/9864040725191801 : AFEA0846BBA9831D
PRP: Verified
PRP without proof (not generated)