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
2028137Factored
FactorDigitsBitsDate
3421797703112901198541612478.22020-01-05 03:44:51
ECM
DigitsB1Curves
2550000280 / 280
30250000124 / 640
Estimated T-Level: 26.0 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Michael GieringE1654F0F495F5FCD0
Verified (Factored)1999-01-10Jiri HradeckyE1654F0F495F5FCD262667
Verified (Factored)2016-07-15Mark RoseE1654F0F495F5FCD387660
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-01-05Christoph ZengerD1DEEBEADAEEDBB31202341353
Verified2020-01-08Sébastien BROUCKED1DEEBEADAEEDBB31159980853
History
DateUserTypeResult
2020-01-08Sébastien BROUCKEC-PRP
M2028137/342179770311290119854161 : D1DEEBEADAEEDBB3
PRP: Verified
PRP without proof (not generated)
2020-01-05Christoph ZengerC-PRP
M2028137/342179770311290119854161 : D1DEEBEADAEEDBB3
PRP: Verified
PRP without proof (not generated)
2020-01-05Sergey NosovF-ECM
Factor: 342179770311290119854161 / (ECM curve 2, B1=50000, B2=5000000)
2019-04-10mikrNF-PM1
B1=4000000, B2=200000000, E=12
2019-03-20chuenkitNF
no factor from 2^67 to 2^68
2016-07-15Mark RoseC-LL
E1654F0F495F5FCD
2016-07-06Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-10-31ramgeisNF
no factor from 2^65 to 2^66
2015-04-13VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-13VictordeHollanderNF
no factor from 2^63 to 2^64
2013-10-19David CampeauNF-PM1
B1=580000, B2=15080000, E=12
2013-02-21dbaughNF
no factor from 2^62 to 2^63
2012-02-07Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-12-14JossNF-PM1
B1=202813
2009-01-03Sturle SundeNF
no factor from 2^60 to 2^61