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
1502201Factored
FactorDigitsBitsDate
996185816448431884504581904953775353939140132.92015-01-22 10:36:28
ECM
DigitsB1Curves
2550000280 / 280
30250000105 / 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)Tom BrownB649B1C9A0ACB8E80
Verified (Factored)1998-10-11Bradford BrownB649B1C9A0ACB8E81332853
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-01Oliver Kruse43EDD8392009BFA51013
Verified2017-10-29Chang Chia-Tche43EDD8392009BFA51141952313
P-1 factors
DateFactorB1B2
2015-01-229961858164484318845045819049537753539391100000000
History
DateUserTypeResult
2017-10-29Chang Chia-TcheC-PRP
M1502201/9961858164484318845045819049537753539391 : 43EDD8392009BFA5
PRP: Verified
PRP without proof (not generated)
2017-10-01Oliver KruseC-PRP
M1502201/9961858164484318845045819049537753539391 : 43EDD8392009BFA5
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12
2015-01-22VictordeHollanderF-PM1
Factor: 9961858164484318845045819049537753539391 / (P-1, B1=10000000)
2015-01-06snme2pm1NF
no factor from 2^64 to 2^65
2015-01-06snme2pm1NF
no factor from 2^63 to 2^64
2013-11-13David CampeauNF-PM1
B1=935000, B2=27115000, E=12
2011-01-25-Anonymous-NF-PM1
B1=80000, B2=1280000, E=6
2010-02-19GrunwalderGIMPNF
no factor from 2^1 to 2^63