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

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MnStatusDetails
4418489Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
592077527929.1old
8408632043709572947757112946093099.42022-10-28 02:35:25
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
Verified (Factored)2017-09-20kkmrkkblmbrbkB3EC16E44AD140C91013
Verified (Factored)2018-02-10Oliver KruseB3EC16E44AD140C9164800513
Verified2022-11-03kutens8D3263762D027D422189015653
P-1 factors
DateFactorB1B2
2022-10-28840863204370957294775711294609220000145842840
History
DateUserTypeResult
2022-11-04Chad Steenerson CERT
PRP Certification
Proof certified good
2022-11-03kutensC-PRP
M4418489/592077527/840863204370957294775711294609 : 8D3263762D027D42
PRP proof power = 7
PRP: Verified
Proof certified good
2022-10-28USAFSSF-PM1
Factor: 840863204370957294775711294609 / (P-1, B1=220000, B2=145842840)
2018-02-10Oliver KruseC-PRP
M4418489/592077527 : B3EC16E44AD140C9
PRP: Verified (Factored)
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M4418489/592077527 : B3EC16E44AD140C9
PRP: Verified (Factored)
PRP without proof (not generated)