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

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Exponent Range:










MnStatusDetails
3738541Factored
FactorDigitsBitsDate
13094153857566324764092270.12021-08-09 07:39:09
ECM
DigitsB1Curves
255000015 / 280
Estimated T-Level: 20.3
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-02-12Mark Neely4518B921BC04ACDE0
Verified (Factored)1999-09-30Chionh Wei Peng4518B921BC04ACDE435490
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-08-09/r/countingD358F84DDDA347D4156182153
History
DateUserTypeResult
2022-05-25JossNF-PM1
B1=100000, B2=130364850
2022-03-22JossNF-PM1
B1=100000
2022-03-03JossNF-PM1
B1=90000
2021-08-09ky0urakuCERT
PRP Certification
Proof certified good
2021-08-09/r/countingC-PRP
M3738541/1309415385756632476409 : D358F84DDDA347D4
PRP proof power = 7
PRP: Verified
Proof certified good
2021-08-09nordiF-ECM
Factor: 1309415385756632476409 / (ECM curve 3, B1=50000, B2=6750000, Sigma=2655794953700199)
2021-03-17axnNF
no factor from 2^69 to 2^70
2020-12-11axnNF
no factor from 2^68 to 2^69
2018-08-20TJAOINF
no factor from 2^67 to 2^68
2016-11-05Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-25ramgeisNF
no factor from 2^65 to 2^66
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-10-27mikrNF-PM1
B1=1600000, B2=66000000, E=12
2015-01-23VictordeHollanderNF
no factor from 2^64 to 2^65
2015-01-23VictordeHollanderNF
no factor from 2^63 to 2^64
2013-02-09Squeeky_SquirrelNF-PM1
B1=85000, B2=1445000, E=6
2012-05-10GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-05-09Grant McCrackenNF
no factor from 2^61 to 2^62
2009-07-06Carsten KossendeyNF-PM1
B1=20000, B2=265000
2009-03-05S485122NF
no factor from 2^60 to 2^61