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
2505073Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
154067575963094391753.8old
ECM
DigitsB1Curves
2550000147 / 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
Verified2017-10-14Oliver KruseBBA48C0C2EF029051110554153
Verified2017-11-30storm5510BBA48C0C2EF02905115649553
History
DateUserTypeResult
2022-08-19USAFSSNF-PM1
B1=240000, B2=199861200
2017-11-30storm5510C-PRP
M2505073/15406757596309439 : BBA48C0C2EF02905
PRP: Verified
PRP without proof (not generated)
2017-10-14Oliver KruseC-PRP
M2505073/15406757596309439 : BBA48C0C2EF02905
PRP: Verified
PRP without proof (not generated)