Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:





MnDetails
899671
Composite, with 2 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
81402232091032.9old
1424499475876011547.02008-09-30 13:18:28
ECM
DigitsB1Curves
2550000280 / 280
30250000100 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Verified
No proof (small exponent)
2017-09-28Oliver Kruse365E42C4CF8AEC2E2013
Verified
No proof (small exponent)
2017-10-14Oliver Kruse365E42C4CF8AEC2E249932613
Verified
No proof (small exponent)
2017-12-20ATH365E42C4CF8AEC2E264101313
Verified
No proof (small exponent)
2020-04-23Oliver Kruse445598E2B8C32664215420153
Verified
Certified Good
2025-05-13kkmrkkblmbrbk445598E2B8C32664289587653
History
DateUserTypeResult
2025-05-13S147127CERT
Proof certified good
2025-05-13kkmrkkblmbrbkC-PRP
Proof Certified Good

Proof Power: 6

2024-10-29Anton TsvetkovNF-PM1B1=8000000, B2=10082709000
2020-04-23Oliver KruseC-PRP
M899671/8140223209/142449947587601 : 445598E2B8C32664
2017-12-20ATHC-PRP
M899671/8140223209/142449947587601 : 365E42C4CF8AEC2E
2017-10-14Oliver KruseC-PRP
M899671/8140223209/142449947587601 : 365E42C4CF8AEC2E
2017-09-28Oliver KruseC-PRPM899671/8140223209/142449947587601 : 365E42C4CF8AEC2E
2016-03-17alpertronNF-PM1B1=300000, B2=10000000, E=12
2008-09-30markrFFactor: 142449947587601