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
2248639Factored
FactorDigitsBitsDate
4841756997749142528172168.72020-04-12 22:50:15
ECM
DigitsB1Curves
255000060 / 280
Estimated T-Level: 21.1
TF below 2^65 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)John Borleis IIIA78D2A25965C165D0
Verified (Factored)1999-07-26George S. TaylorA78D2A25965C165D2239188
Verified (Factored)2018-04-22kkmrkkblmbrbkA78D2A25965C165D695482
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-04-13M Miller6D80888F1D1FF8FE1159866053
Verified2020-04-15arnaud6D80888F1D1FF8FE1190947753
History
DateUserTypeResult
2020-04-15arnaudC-PRP
M2248639/484175699774914252817 : 6D80888F1D1FF8FE
PRP: Verified
PRP without proof (not generated)
2020-04-13M MillerC-PRP
M2248639/484175699774914252817 : 6D80888F1D1FF8FE
PRP: Verified
PRP without proof (not generated)
2020-04-12mnd9F-ECM
Factor: 484175699774914252817 / (ECM curve 3, B1=50000, B2=5000000, Sigma=3459317340829659)
2019-03-25TJAOINF
no factor from 2^67 to 2^68
2018-04-22kkmrkkblmbrbkC-LL
A78D2A25965C165D
2017-01-13ConductorNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-12-06Alexander DubrovinNF-PM1
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=142088
2014-06-01JossNF-PM1
B1=113544
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