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
2637221Factored
FactorDigitsBitsDate
52703092363966799508472272.22018-05-02 15:50:57
ECM
DigitsB1Curves
255000037 / 280
Estimated T-Level: 20.7
TF below 2^64 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Horng-Ming ChenAFF0AFDCBB0E49400
Verified (Factored)1999-07-04Jan BraconnierAFF0AFDCBB0E49401702441
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2018-05-03_p95holder_7FFC2DD405FB381B1164888353
Verified2018-05-04Netanias7FFC2DD405FB381B1224024753
History
DateUserTypeResult
2019-07-04alpertronNF-PM1
B1=2000000, B2=60000000, E=12
2018-05-04NetaniasC-PRP
M2637221/5270309236396679950847 : 7FFC2DD405FB381B
PRP: Verified
PRP without proof (not generated)
2018-05-03_p95holder_C-PRP
M2637221/5270309236396679950847 : 7FFC2DD405FB381B
PRP: Verified
PRP without proof (not generated)
2018-05-02Chang Chia-TcheF-ECM
Factor: 5270309236396679950847 / (ECM curve 2, B1=50000, B2=5000000)
2017-09-01Gordon SpenceNF
no factor from 2^66 to 2^67
2017-04-27JossNF-PM1
B1=360000, B2=3600000, E=6
2016-12-27JossNF-PM1
B1=206385
2016-12-26JossNF-PM1
B1=171988
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2016-01-19ramgeisNF
no factor from 2^65 to 2^66
2015-02-23VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-23VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-14dbaughNF
no factor from 2^62 to 2^63
2012-06-11Grant McCrackenNF
no factor from 2^61 to 2^62
2011-01-19James HeinrichNF-PM1
B1=180000, B2=4275000, E=6
2009-06-21USAFSSNF-PM1
B1=30000, B2=420000
2009-01-31Sturle SundeNF
no factor from 2^60 to 2^61