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
2520481Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
545345131805511445.6old
ECM
DigitsB1Curves
2550000132 / 280
Estimated T-Level: 22.4
TF below 2^69 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-14Oliver Kruse39C00D7816B2639D1194304553
Verified2017-12-01kkmrkkblmbrbk39C00D7816B2639D1124171853
History
DateUserTypeResult
2022-08-21USAFSSNF-PM1
B1=240000, B2=199861200
2017-12-01kkmrkkblmbrbkC-PRP
M2520481/54534513180551 : 39C00D7816B2639D
PRP: Verified
PRP without proof (not generated)
2017-10-14Oliver KruseC-PRP
M2520481/54534513180551 : 39C00D7816B2639D
PRP: Verified
PRP without proof (not generated)