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

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MnStatusDetails
4194301Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
28738884329934635771961.3old
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Conrad CurryF4E12B59552BF9110
Verified (Factored)Steve SommarsF4E12B59552BF9110
Verified (Factored)S09429F4E12B59552BF9113754002
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-20kkmrkkblmbrbk1A652E695C11238D1013
Verified2018-01-18Chang Chia-Tche1A652E695C11238D1258794713
History
DateUserTypeResult
2024-06-07kkmrkkblmbrbkNF
no factor from 2^71 to 2^72
2024-06-07kkmrkkblmbrbkNF
no factor from 2^70 to 2^71
2024-06-07kkmrkkblmbrbkNF
no factor from 2^69 to 2^70
2024-06-07kkmrkkblmbrbkNF
no factor from 2^68 to 2^69
2024-06-07kkmrkkblmbrbkNF
no factor from 2^67 to 2^68
2023-03-04USAFSSNF-PM1
B1=224000, B2=119776800
2018-01-18Chang Chia-TcheC-PRP
M4194301/2873888432993463577 : 1A652E695C11238D
PRP: Verified
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M4194301/2873888432993463577 : 1A652E695C11238D
PRP: Verified
PRP without proof (not generated)