Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
11886943Factored
FactorDigitsBitsDate
12709719077468357408605912580.12021-07-21 03:10:47
24951532012294225759996554086973733107.62021-07-21 03:10:47
ECM
DigitsB1Curves
25500002 / 280
Estimated T-Level: 20.0
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2001-06-17Christopher G. Lewis031997F4DDED03677137631
Verified (Factored)2004-05-11Ars Technica Team Prime Rib031997F4DDED036710138605
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-11-26Joe S.28158693909EA7222160312953
P-1 factors
DateFactorB1B2
2021-07-212495153201229422575999655408697376189107185673210
2021-07-2112709719077468357408605916189107185673210
History
DateUserTypeResult
2021-11-26gLaussCERT
PRP Certification
Proof certified good
2021-11-26Joe S.C-PRP
M11886943/249515320122942257599965540869737/1270971907746835740860591 : 28158693909EA722
PRP proof power = 8
PRP: Verified
Proof certified good
2021-07-21LaurVF-PM1
Factor: 317126962428718354552798557405359962578621220783007834567 / (P-1, B1=6189107, B2=185673210)
2021-07-21LaurVF-PM1
Factor: 317126962428718354552798557405359962578621220783007834567 / (P-1, B1=6189107, B2=185673210)
2021-05-19lycornNF
no factor from 2^69 to 2^70
2019-08-09riccardo ubertiNF-PM1
B1=430000, B2=8500000, E=12
2018-01-18ramgeisNF
no factor from 2^68 to 2^69
2018-01-18ramgeisNF
no factor from 2^67 to 2^68
2016-02-15VictordeHollanderNF
no factor from 2^66 to 2^67
2013-11-02NesowaNF
no factor from 2^65 to 2^66
2013-10-22lycornNF
no factor from 2^64 to 2^65