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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
9903857Factored
FactorDigitsBitsDate
98048184311033.2old
1122973895021821254120072476.62021-05-30 14:34:09
ECM
DigitsB1Curves
255000040 / 280
Estimated T-Level: 20.7 ⓘ
TF below 2^64 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2019-11-14mnd9271884C93365199D1672328353
Verified (Factored)2021-01-09One Man271884C93365199D151877753
Verified2021-06-01kutens271884C93365199D2472538453
History
DateUserTypeResult
2021-06-02One ManNF-PP1
Start=6/5, B1=1200000, B2=67200000
2021-06-01curtiscCERT
PRP Certification
Proof certified good
2021-06-01kutensC-PRP
M9903857/9804818431/112297389502182125412007 : 271884C93365199D
PRP proof power = 8
PRP: Verified
Proof certified good
2021-05-30One ManF-PP1
Start=2/7, B1=1200000, B2=67200000, Factor: 112297389502182125412007
2021-01-09Tan Loe JooCERT
PRP Certification
Proof certified good
2021-01-09One ManC-PRP
M9903857/9804818431 : 271884C93365199D
PRP proof power = 8
PRP: Verified (Factored)
Proof certified good
2019-11-14mnd9C-PRP
M9903857/9804818431 : 271884C93365199D
PRP: Verified (Factored)
PRP without proof (not generated)