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
1400261Factored
FactorDigitsBitsDate
3405744655082264044072168.22014-07-22 17:07:49
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)Holger MüllerE19427E6BDD916DC0
Verified (Factored)Harald RichterE19427E6BDD916DC0
Verified (Factored)Tom CageE19427E6BDD916DC0
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-30Oliver Kruse3D5A430E74974CA71013
Verified2017-10-25kkmrkkblmbrbk3D5A430E74974CA7156422913
History
DateUserTypeResult
2017-10-25kkmrkkblmbrbkC-PRP
M1400261/340574465508226404407 : 3D5A430E74974CA7
PRP: Verified
PRP without proof (not generated)
2017-09-30Oliver KruseC-PRP
M1400261/340574465508226404407 : 3D5A430E74974CA7
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12
2014-07-22XyzzyF-ECM
Factor: 340574465508226404407 / (ECM curve 1, B1=50000, B2=5000000)
2011-04-05GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-01-08BloodIceNF
no factor from 2^61 to 2^62
2010-04-24Rob_DeeNF-PM1
B1=5000000, B2=5100000
2010-04-23Rob_DeeNF-PM1
B1=4800000, B2=5000000
2010-04-22Rob_DeeNF-PM1
B1=4600000, B2=4800000
2010-04-21Rob_DeeNF-PM1
B1=4400000, B2=4600000
2010-04-20Rob_DeeNF-PM1
B1=4200000, B2=4400000
2010-04-19Rob_DeeNF-PM1
B1=4000000, B2=4200000
2010-04-18Rob_DeeNF-PM1
B1=3800000, B2=4000000
2010-04-17Rob_DeeNF-PM1
B1=3600000, B2=3800000
2010-04-16Rob_DeeNF-PM1
B1=3400000, B2=3600000
2010-04-15Rob_DeeNF-PM1
B1=3200000, B2=3400000
2010-04-14Rob_DeeNF-PM1
B1=3000000, B2=3200000
2010-04-13Rob_DeeNF-PM1
B1=2800000, B2=3000000
2010-04-12Rob_DeeNF-PM1
B1=2600000, B2=2800000
2010-04-11Rob_DeeNF-PM1
B1=2400000, B2=2600000
2010-04-10Rob_DeeNF-PM1
B1=2200000, B2=2400000
2010-04-09Rob_DeeNF-PM1
B1=2000000, B2=2200000
2010-04-08Rob_DeeNF-PM1
B1=1800000, B2=2000000
2010-04-07Rob_DeeNF-PM1
B1=1600000, B2=1800000
2010-04-06Rob_DeeNF-PM1
B1=1400000, B2=1600000
2010-04-05Rob_DeeNF-PM1
B1=1200000, B2=1400000
2010-04-04Rob_DeeNF-PM1
B1=1000000, B2=1200000
2010-04-03Rob_DeeNF-PM1
B1=800000, B2=1000000
2010-04-02Rob_DeeNF-PM1
B1=600000, B2=800000
2010-04-01Rob_DeeNF-PM1
B1=400000, B2=600000
2010-03-31Rob_DeeNF-PM1
B1=200000, B2=400000
2009-02-16Sturle SundeNF
no factor from 2^60 to 2^61