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
1971251Factored
FactorDigitsBitsDate
3942503721.9old
21289510811031.02008-07-15 07:48:49
22866511611031.12008-07-15 07:48:49
831095704133271446.22014-02-06 17:53:12
2733186348423771548.02014-03-21 11:57:46
15155049150106652171960.42016-02-03 12:59:10
9670035761151676802232169.72021-05-09 07:19:22
ECM
DigitsB1Curves
2550000280 / 280
3025000058 / 640
Estimated T-Level: 25.5
TF below 2^80 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-05Oliver Kruse8EE54036AB39B7746013
Verified (Factored)2017-11-15kkmrkkblmbrbk8EE54036AB39B774644335813
Verified2021-05-09/r/countingCB53B87A91AA7EBD7196791053
History
DateUserTypeResult
2023-12-17USAFSSNF-PM1
B1=480000, B2=460965960
2022-12-23LordJuliusNF
no factor from 2^67 to 2^68
2022-12-23LordJuliusNF
no factor from 2^66 to 2^67
2022-12-23LordJuliusNF
no factor from 2^65 to 2^66
2022-12-23LordJuliusNF
no factor from 2^64 to 2^65
2022-12-23LordJuliusNF
no factor from 2^63 to 2^64
2022-12-23LordJuliusNF
no factor from 2^62 to 2^63
2022-12-23LordJuliusNF
no factor from 2^61 to 2^62
2022-08-12USAFSSNF-PM1
B1=132000, B2=134381520
2021-05-09S00030CERT
PRP Certification
Proof certified good
2021-05-09/r/countingC-PRP
M1971251/3942503/2128951081/2286651161/83109570413327/273318634842377/1515504915010665217/967003576115167680223 : CB53B87A91AA7EBD
PRP proof power = 7
PRP: Verified
Proof certified good
2021-05-09MarkSF-ECM
Factor: 967003576115167680223 / (ECM curve 2, B1=50000, B2=5000000, Sigma=8761570036913175)
2017-11-15kkmrkkblmbrbkC-PRP
M1971251/3942503/2128951081/2286651161/83109570413327/273318634842377/1515504915010665217 : 8EE54036AB39B774
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-05Oliver KruseC-PRP
M1971251/3942503/2128951081/2286651161/83109570413327/273318634842377/1515504915010665217 : 8EE54036AB39B774
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-05Oliver KruseC-PRP
M1971251/3942503/2128951081/2286651161/83109570413327/273318634842377/1515504915010665217 : 8EE54036AB39B774
PRP without proof (not generated)
2016-02-03TJAOIF
Factor: 1515504915010665217 / TF: 60-61
2014-03-21TJAOIF
Factor: 273318634842377
2014-02-06TJAOIF
Factor: 83109570413327
2008-07-15J FeitsmaF
Factor: 2286651161
2008-07-15J FeitsmaF
Factor: 2128951081