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

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MnStatusDetails
2401237Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
38419793825.2old
903009186231136.42008-07-14 20:23:37
ECM
DigitsB1Curves
2550000100 / 280
Estimated T-Level: 21.8
TF below 2^67 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-12Oliver Kruse00FE2B39434AE0A92117391953
Verified2017-11-26kkmrkkblmbrbk00FE2B39434AE0A92148139653
History
DateUserTypeResult
2018-09-28alpertronNF-PM1
B1=2000000, B2=60000000, E=12
2017-11-26kkmrkkblmbrbkC-PRP
M2401237/38419793/90300918623 : 00FE2B39434AE0A9
PRP: Verified
PRP without proof (not generated)
2017-10-12Oliver KruseC-PRP
M2401237/38419793/90300918623 : 00FE2B39434AE0A9
PRP: Verified
PRP without proof (not generated)
2008-07-14George WoltmanF-ECM
Factor: 90300918623