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
11382257Factored
FactorDigitsBitsDate
250516261102242017239233317855922411137120.92020-04-01 20:04:37
ECM
DigitsB1Curves
255000015 / 280
Estimated T-Level: 20.3
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2000-11-25Richard OtterFB70A4C55C1E8A939006481
Verified (Factored)2004-02-23Douglas FeatherFB70A4C55C1E8A934230302
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-04-02riccardo uberti8F2202D3F89EC5091492242653
Verified2021-03-14Richard Thomas8F2202D3F89EC50911115137453
P-1 factors
DateFactorB1B2
2020-04-0125051626110224201723923331785592241114300000
History
DateUserTypeResult
2021-07-01riccardo ubertiNF-PM1
B1=750000, B2=20000000, E=12
2021-03-14curtiscCERT
PRP Certification
Proof certified good
2021-03-14Richard ThomasC-PRP
M11382257/2505162611022420172392333178559224111 : 8F2202D3F89EC509
PRP proof power = 8
PRP: Verified
Proof certified good
2020-04-02riccardo ubertiC-PRP
M11382257/2505162611022420172392333178559224111 : 8F2202D3F89EC509
PRP: Verified
PRP without proof (not generated)
2020-04-01riccardo ubertiF-PM1
Factor: 2505162611022420172392333178559224111 / (P-1, B1=430000)
2017-12-27ramgeisNF
no factor from 2^68 to 2^69
2017-12-27ramgeisNF
no factor from 2^67 to 2^68
2016-01-04VictordeHollanderNF
no factor from 2^66 to 2^67
2015-05-05NesowaNF
no factor from 2^65 to 2^66
2013-11-18lycornNF
no factor from 2^64 to 2^65