Marin Mersenne 2^P-1
Username
Password
Forgot password?
Blue
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
2108369Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
3847225970855024897032168.4old
131298627825436787258185241112993.42022-03-16 17:01:42
ECM
DigitsB1Curves
2550000280 / 280
30250000159 / 640
Estimated T-Level: 26.2 ⓘ
TF below 2^82 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Chet Richards45E13B03EFDD73410
Verified (Factored)1999-02-07John Ibe45E13B03EFDD73411021088
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-10-07Oliver Kruse87CA9E904B379DBC1013
Verified (Factored)2017-11-17kkmrkkblmbrbk87CA9E904B379DBC128255613
Verified2022-03-17SRJ28771B0D5C9338FB3E30240205153
History
DateUserTypeResult
2022-03-17George WoltmanCERT
PRP Certification
Proof certified good
2022-03-17SRJ2877C-PRP
M2108369/384722597085502489703/13129862782543678725818524111 : 1B0D5C9338FB3E30
PRP proof power = 7
PRP: Verified
Proof certified good
2022-03-16PluckyPizzicatoF-ECM
Factor: 13129862782543678725818524111 / (ECM curve 7, B1=50000, B2=5450000, Sigma=851787691150242)
2017-11-17kkmrkkblmbrbkC-PRP
M2108369/384722597085502489703 : 87CA9E904B379DBC
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-07Oliver KruseC-PRP
M2108369/384722597085502489703 : 87CA9E904B379DBC
PRP: Verified (Factored)
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12