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

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MnStatusDetails
1673927Factored
FactorDigitsBitsDate
1288901093666828519832166.82012-02-17 11:17:43
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)Carl-Johan Larsson84555BA30D2AC16A0
Verified (Factored)Cornelius Caesar84555BA30D2AC16A0
Verified (Factored)1999-04-13John G Horne84555BA30D2AC16A174929
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-02Oliver KruseA13B021F55B8263C1013
Verified2017-11-03kkmrkkblmbrbkA13B021F55B8263C112050513
History
DateUserTypeResult
2017-11-03kkmrkkblmbrbkC-PRP
M1673927/128890109366682851983 : A13B021F55B8263C
PRP: Verified
PRP without proof (not generated)
2017-10-02Oliver KruseC-PRP
M1673927/128890109366682851983 : A13B021F55B8263C
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12
2012-02-17AxonF-ECM
Factor: 128890109366682851983
2012-02-17AxonNF-PM1
B1=1000000, B2=40000000, E=12
2012-02-17AxonNF-PM1
B1=1000000, B2=32000000, E=12
2012-02-17AxonNF-PM1
B1=1000000, B2=24000000, E=12
2012-02-17AxonNF-PM1
B1=1000000, B2=16000000, E=12
2012-02-17AxonNF-PM1
B1=1000000
2012-02-17AxonNF-PM1
B1=900000
2012-02-17AxonNF-PM1
B1=800000
2012-02-17AxonNF-PM1
B1=700000
2012-02-17AxonNF-PM1
B1=600000
2012-02-17AxonNF-PM1
B1=500000
2012-02-17AxonNF-PM1
B1=400000
2012-02-17AxonNF-PM1
B1=300000
2012-02-17AxonNF-PM1
B1=200000
2012-02-17AxonNF-PM1
B1=100000
2010-08-31GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-27Architects CubedNF
no factor from 2^60 to 2^61