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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
2248723Factored
FactorDigitsBitsDate
2378646014301685918312167.72015-12-06 08:24:55
ECM
DigitsB1Curves
255000085 / 280
Estimated T-Level: 21.5
TF below 2^66 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)John Borleis III52BC2B127A3DE90B0
Verified (Factored)1999-03-15Guillermo Ballester Valor52BC2B127A3DE90B145787
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-30alpertronEF65011C31199C1B1013
Verified2017-10-29Oliver KruseEF65011C31199C1B177835913
P-1 factors
DateFactorB1B2
2015-12-06237864601430168591831100000020000000
History
DateUserTypeResult
2022-03-09LordJuliusNF
no factor from 2^1 to 2^60
2017-10-29Oliver KruseC-PRP
M2248723/237864601430168591831 : EF65011C31199C1B
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M2248723/237864601430168591831 : EF65011C31199C1B
PRP: Verified
PRP without proof (not generated)
2016-05-03alpertronNF-PM1
B1=500000, B2=15000000, E=12
2015-12-06Alexander DubrovinF-PM1
Factor: 237864601430168591831 / (P-1, B1=1000000, B2=20000000, E=12)
2015-10-27ramgeisNF
no factor from 2^65 to 2^66
2015-03-10VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-10VictordeHollanderNF
no factor from 2^63 to 2^64
2014-10-03JossNF-PM1
B1=142086
2014-06-01JossNF-PM1
B1=113543
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2012-05-04Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-14Oscar ÖstlinNF-PM1
B1=85000, B2=1636250, E=6
2010-11-11Oscar ÖstlinNF-PM1
B1=75011
2010-11-06JossNF-PM1
B1=15000
2009-01-10Sturle SundeNF
no factor from 2^60 to 2^61