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
9419203Factored
FactorDigitsBitsDate
8382253862998439849586312479.52014-08-20 15:58:44
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)2000-09-23Richard Prairie1752B95B42D70FA20
Verified (Factored)2003-05-04Marc Getty / Phil Fizur1752B95B42D70FA24359993
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2019-09-06Niels_Mache_Nextcloud6840ABC878F219461647244153
Verified2020-11-26kutens6840ABC878F21946183551753
History
DateUserTypeResult
2020-11-26Ben DeloCERT
PRP Certification
Proof certified good
2020-11-26kutensC-PRP
M9419203/838225386299843984958631 : 6840ABC878F21946
PRP proof power = 8
PRP: Verified
Proof certified good
2019-09-06Niels_Mache_NextcloudC-PRP
M9419203/838225386299843984958631 : 6840ABC878F21946
PRP: Verified
PRP without proof (not generated)
2014-08-20swildnerF-ECM
Factor: 838225386299843984958631 / (ECM curve 1, B1=50000, B2=5000000)
2013-09-02NesowaNF
no factor from 2^64 to 2^65
2011-07-17James HeinrichNF-PM1
B1=180000, B2=3915000, E=6