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

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MnStatusDetails
4507297Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
135218911927.0old
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
Verified2017-09-20kkmrkkblmbrbk098E6E91D12CB4241013
Verified2018-02-17ATH098E6E91D12CB424173086813
History
DateUserTypeResult
2022-10-03USAFSSNF-PM1
B1=240000, B2=158253810
2018-02-17ATHC-PRP
M4507297/135218911 : 098E6E91D12CB424
PRP: Verified
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M4507297/135218911 : 098E6E91D12CB424
PRP: Verified
PRP without proof (not generated)