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
2519591Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
5039183722.3old
201567281927.62008-07-14 20:24:33
ECM
DigitsB1Curves
2550000108 / 280
Estimated T-Level: 21.9
TF below 2^68 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-14Oliver Kruse53F9C049BF16F0A1236873453
Verified2017-11-30kkmrkkblmbrbk53F9C049BF16F0A1239920553
History
DateUserTypeResult
2019-07-04alpertronNF-PM1
B1=2000000, B2=60000000, E=12
2017-11-30kkmrkkblmbrbkC-PRP
M2519591/5039183/201567281 : 53F9C049BF16F0A1
PRP: Verified
PRP without proof (not generated)
2017-10-14Oliver KruseC-PRP
M2519591/5039183/201567281 : 53F9C049BF16F0A1
PRP: Verified
PRP without proof (not generated)
2008-07-14George WoltmanF-ECM
Factor: 201567281