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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Exponent Range:





MnDetails
2272861
Composite, with 2 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 262
Factored
FactorDigitsBitsDate
472755089928.8old
47350558670231342.12008-07-14 20:22:36
ECM
DigitsB1Curves
2550000280 / 280
30250000167 / 640
Estimated T-Level: 26.3
TF below 2^82 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors
ShiftTypeBase
Verified
PRP without proof (not generated)
2017-10-11Oliver Kruse5D1AEADED3B6CB602013
Verified
PRP without proof (not generated)
2017-11-21storm55105D1AEADED3B6CB602105287113
History
DateUserTypeResult
2017-11-21storm5510C-PRP
M2272861/472755089/4735055867023 : 5D1AEADED3B6CB60
2017-10-11Oliver KruseC-PRPM2272861/472755089/4735055867023 : 5D1AEADED3B6CB60
2016-04-30alpertronNF-PM1B1=500000, B2=15000000, E=12
2008-07-14George WoltmanF-ECMFactor: 4735055867023