Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
2495767Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
59898409825.8old
814023415050348971756.22015-03-13 12:43:23
ECM
DigitsB1Curves
2550000162 / 280
Estimated T-Level: 22.9
TF below 2^71 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-14Oliver Kruse23C850BFC671AC4E2108232953
Verified2017-11-30Chang Chia-Tche23C850BFC671AC4E251502753
History
DateUserTypeResult
2019-07-04alpertronNF-PM1
B1=2000000, B2=60000000, E=12
2017-11-30Chang Chia-TcheC-PRP
M2495767/59898409/81402341505034897 : 23C850BFC671AC4E
PRP: Verified
PRP without proof (not generated)
2017-10-14Oliver KruseC-PRP
M2495767/59898409/81402341505034897 : 23C850BFC671AC4E
PRP: Verified
PRP without proof (not generated)
2015-03-13TJAOIF
Factor: 81402341505034897 / TF: 56-57