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
1915759Factored
FactorDigitsBitsDate
13505089451059464203915224492890.12020-07-06 16:44:14
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)Kim NeveE8D7C0E4401F606D0
Verified (Factored)1998-12-27Takahiro ShakushiE8D7C0E4401F606D461206
Verified (Factored)2015-07-01MadPooE8D7C0E4401F606D1495369
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-07-06C-Murray4212C7F50CD1C79EA6158022153
Verified2020-07-07pew12C7F50CD1C79EA6181662453
History
DateUserTypeResult
2020-07-07pewC-PRP
M1915759/1350508945105946420391522449 : 12C7F50CD1C79EA6
PRP: Verified
PRP without proof (not generated)
2020-07-06C-Murray42C-PRP
M1915759/1350508945105946420391522449 : 12C7F50CD1C79EA6
PRP: Verified
PRP without proof (not generated)
2020-07-06GANF-ECM
Factor: 1350508945105946420391522449 / (ECM curve 1, B1=50000, B2=5000000, Sigma=2055971113678575)
2019-04-28chuenkitNF
no factor from 2^67 to 2^68
2017-12-20mikrNF-PM1
B1=8000000, B2=320000000, E=12
2017-03-15Smok_bmv NF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2015-10-02ramgeisNF
no factor from 2^65 to 2^66
2015-07-01MadPooC-LL
E8D7C0E4401F606D
2015-05-16snme2pm1NF
no factor from 2^64 to 2^65
2015-05-16snme2pm1NF
no factor from 2^63 to 2^64
2011-08-16kurlyNF-PM1
B1=1000000, B2=30000000, E=12
2011-07-17GrunwalderGIMPNF
no factor from 2^1 to 2^63
2009-05-31Architects CubedNF
no factor from 2^60 to 2^61