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
1870859Factored
FactorDigitsBitsDate
3741719721.8old
296909229990346631754.72014-12-10 12:40:18
1644644983472259240072167.22015-08-15 18:11:00
826319030437733732116332376.12020-11-27 05:57:21
ECM
DigitsB1Curves
2550000280 / 280
30250000106 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-30alpertronD227591CEDDDC9423013
Verified (Factored)2017-10-19Oliver KruseD227591CEDDDC942325051913
Verified2020-11-27mrhB36E81514A0CE9AC421720153
P-1 factors
DateFactorB1B2
2015-08-1516446449834722592400750000015000000
History
DateUserTypeResult
2020-11-27Yves de WandelaarCERT
PRP Certification
Proof certified good
2020-11-27mrhC-PRP
M1870859/3741719/29690922999034663/164464498347225924007/82631903043773373211633 : B36E81514A0CE9AC
PRP proof power = 7
PRP: Verified
Proof certified good
2020-11-27MarkSF-ECM
Factor: 82631903043773373211633 / (ECM curve 1, B1=50000, B2=5000000, Sigma=2051050786738139)
2017-10-19Oliver KruseC-PRP
M1870859/3741719/29690922999034663/164464498347225924007 : D227591CEDDDC942
PRP: Verified (Factored)
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M1870859/3741719/29690922999034663/164464498347225924007 : D227591CEDDDC942
PRP: Verified (Factored)
PRP without proof (not generated)
2015-08-15alpertronF-PM1
Factor: 164464498347225924007 / (P-1, B1=500000, B2=15000000, E=12)
2014-12-10TJAOIF
Factor: 29690922999034663 / TF: 54-55