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
2915461Factored
FactorDigitsBitsDate
1241763370030307208451692476.72015-12-24 11:17:17
ECM
DigitsB1Curves
255000011 / 280
Estimated T-Level: 20.2
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-08-16Phil DeGruy3E5E98BEBAFFAD800
Verified (Factored)1999-07-27Carl Mikkelsen3E5E98BEBAFFAD802483823
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-30alpertron320223EFA34EF5181013
Verified2017-11-18Oliver Kruse320223EFA34EF5181126384113
History
DateUserTypeResult
2017-11-18Oliver KruseC-PRP
M2915461/124176337003030720845169 : 320223EFA34EF518
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M2915461/124176337003030720845169 : 320223EFA34EF518
PRP: Verified
PRP without proof (not generated)
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2015-12-24bamF-ECM
Factor: 124176337003030720845169 / (ECM curve 2, B1=50000, B2=5000000)
2015-04-25VictordeHollanderNF-PM1
B1=1000000, B2=20000000, E=12
2015-04-25VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-25VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-07dbaughNF
no factor from 2^62 to 2^63
2011-12-20Grant McCrackenNF
no factor from 2^61 to 2^62
2011-01-25markrNF-PM1
B1=105000, B2=2283750, E=6
2010-12-24JossNF-PM1
B1=20000
2009-07-03Carsten KossendeyNF-PM1
B1=15000, B2=168750
2009-02-12Sturle SundeNF
no factor from 2^60 to 2^61