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

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MnStatusDetails
4371049Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
174883222702571444.0old
762254646488891446.12008-09-30 21:35:09
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-20kkmrkkblmbrbkFB06033F502662152013
Verified2018-02-07Oliver KruseFB06033F5026621524542713
History
DateUserTypeResult
2023-05-03USAFSSNF-PM1
B1=448000, B2=251346810
2018-02-07Oliver KruseC-PRP
M4371049/17488322270257/76225464648889 : FB06033F50266215
PRP: Verified
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M4371049/17488322270257/76225464648889 : FB06033F50266215
PRP: Verified
PRP without proof (not generated)
2008-09-30markrF
Factor: 76225464648889