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:










MnStatusDetails
1951837Factored
FactorDigitsBitsDate
58555111825.8old
24322036040711341.12008-07-15 07:48:36
77287247676673345691962.72015-10-03 22:21:33
4786984252770240850406892478.72020-11-24 12:43:42
ECM
DigitsB1Curves
2550000280 / 280
3025000056 / 640
Estimated T-Level: 25.4
TF below 2^80 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-30alpertron130C3867B1B189A43013
Verified (Factored)2017-10-20Oliver Kruse130C3867B1B189A4367619313
Verified2020-11-25rbanov5D3B04A44271756D466363553
P-1 factors
DateFactorB1B2
2015-10-03772872476766733456950000015000000
History
DateUserTypeResult
2020-11-25Ben DeloCERT
PRP Certification
Proof certified good
2020-11-25rbanovC-PRP
M1951837/58555111/2432203604071/7728724767667334569/478698425277024085040689 : 5D3B04A44271756D
PRP proof power = 7
PRP: Verified
Proof certified good
2020-11-24nordiF-ECM
Factor: 478698425277024085040689 / (ECM curve 5, B1=50000, B2=5000000, Sigma=8732859073892162)
2017-10-20Oliver KruseC-PRP
M1951837/58555111/2432203604071/7728724767667334569 : 130C3867B1B189A4
PRP: Verified (Factored)
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M1951837/58555111/2432203604071/7728724767667334569 : 130C3867B1B189A4
PRP: Verified (Factored)
PRP without proof (not generated)
2015-10-03alpertronF-PM1
Factor: 7728724767667334569 / (P-1, B1=500000, B2=15000000, E=12)
2008-07-15J FeitsmaF
Factor: 2432203604071