Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
1664627Factored
FactorDigitsBitsDate
3622899932372719055296632478.32012-02-15 09:13:48
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)Wayne ScottD6A420997CA8F73E0
Verified (Factored)1998-11-21Steve GardnerD6A420997CA8F73E165868
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-02Oliver Kruse8393741660CA63441013
Verified2017-11-02kkmrkkblmbrbk8393741660CA63441121156613
History
DateUserTypeResult
2017-11-02kkmrkkblmbrbkC-PRP
M1664627/362289993237271905529663 : 8393741660CA6344
PRP: Verified
PRP without proof (not generated)
2017-10-02Oliver KruseC-PRP
M1664627/362289993237271905529663 : 8393741660CA6344
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12
2012-02-15AxonF-ECM
Factor: 362289993237271905529663
2012-02-15AxonNF-PM1
B1=1000000, B2=40000000, E=12
2012-02-15AxonNF-PM1
B1=1000000, B2=32000000, E=12
2012-02-15AxonNF-PM1
B1=1000000, B2=24000000, E=12
2012-02-15AxonNF-PM1
B1=1000000, B2=16000000, E=12
2012-02-15AxonNF-PM1
B1=1000000
2012-02-15AxonNF-PM1
B1=900000
2012-02-15AxonNF-PM1
B1=800000
2012-02-15AxonNF-PM1
B1=700000
2012-02-15AxonNF-PM1
B1=600000
2012-02-15AxonNF-PM1
B1=500000
2012-02-15AxonNF-PM1
B1=400000
2012-02-15AxonNF-PM1
B1=300000
2012-02-15AxonNF-PM1
B1=200000
2012-02-15AxonNF-PM1
B1=100000
2010-08-22GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-27Architects CubedNF
no factor from 2^60 to 2^61