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
1531333Factored
FactorDigitsBitsDate
84167714740108997740872272.82015-12-11 00:44:18
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Lee Middle SchoolD22B6E29E9708B490
Verified (Factored)1998-10-25Ethan O'ConnorD22B6E29E9708B49200652
Verified (Factored)2015-06-29MadPooD22B6E29E9708B49159848
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-30alpertron8D5235AD6718FEF01013
Verified2017-10-18Oliver Kruse8D5235AD6718FEF01142103413
History
DateUserTypeResult
2017-10-18Oliver KruseC-PRP
M1531333/8416771474010899774087 : 8D5235AD6718FEF0
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M1531333/8416771474010899774087 : 8D5235AD6718FEF0
PRP: Verified
PRP without proof (not generated)
2015-12-11bamF-ECM
Factor: 8416771474010899774087 / (ECM curve 3, B1=50000, B2=5000000)
2015-10-08omylistNF
no factor from 2^65 to 2^66
2015-06-29MadPooC-LL
D22B6E29E9708B49
2015-03-25VictordeHollanderNF-PM1
B1=10000000, B2=200000000, E=12
2015-02-05snme2pm1NF
no factor from 2^64 to 2^65
2015-02-05snme2pm1NF
no factor from 2^63 to 2^64
2013-10-07David CampeauNF-PM1
B1=945000, B2=27405000, E=12
2011-01-31James HeinrichNF-PM1
B1=80000, B2=1340000, E=6
2010-09-26GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-29Architects CubedNF
no factor from 2^60 to 2^61