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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MnStatusDetails
2372971Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
113902609926.8old
495476344811135.52008-07-14 20:23:25
ECM
DigitsB1Curves
2550000146 / 280
Estimated T-Level: 22.6
TF below 2^70 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-13kkmrkkblmbrbk856E19A98F13D3712180569453
Verified2017-11-01Oliver Kruse856E19A98F13D371234110853
History
DateUserTypeResult
2018-09-28alpertronNF-PM1
B1=2000000, B2=60000000, E=12
2017-11-01Oliver KruseC-PRP
M2372971/113902609/49547634481 : 856E19A98F13D371
PRP: Verified
PRP without proof (not generated)
2017-10-13kkmrkkblmbrbkC-PRP
M2372971/113902609/49547634481 : 856E19A98F13D371
PRP: Verified
PRP without proof (not generated)
2008-07-14George WoltmanF-ECM
Factor: 49547634481