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

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MnDetails
2616199
Composite, with 3 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 263
Factored
FactorDigitsBitsDate
151739543927.2old
24906214491031.22008-07-14 20:29:08
849165871431136.32008-07-14 20:29:08
ECM
DigitsB1Curves
2550000125 / 280
Estimated T-Level: 22.2
TF below 2^69 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
PRP without proof (not generated)
2017-10-17Oliver Kruse44B7129ABC435B37360291753
Verified
PRP without proof (not generated)
2017-12-02storm551044B7129ABC435B37398152253
History
DateUserTypeResult
2019-07-04alpertronNF-PM1B1=2000000, B2=60000000, E=12
2017-12-02storm5510C-PRPM2616199/151739543/2490621449/84916587143 : 44B7129ABC435B37
2017-10-17Oliver KruseC-PRPM2616199/151739543/2490621449/84916587143 : 44B7129ABC435B37
2008-07-14George WoltmanF-ECMFactor: 84916587143
2008-07-14George WoltmanF-ECMFactor: 2490621449