Marin Mersenne 2^P-1
Username
Password
Forgot password?
Black
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
3471959Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
6943919722.7old
10131816372610984499050092579.72019-05-18 20:15:59
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-11-06kkmrkkblmbrbkFCA49F6B741FCFAB1117235653
Verified (Factored)2017-11-23Oliver KruseFCA49F6B741FCFAB165306053
Verified2019-05-21Chang Chia-TcheFCA49F6B741FCFAB246318953
P-1 factors
DateFactorB1B2
2019-05-1810131816372610984499050091157301157300
History
DateUserTypeResult
2022-09-06JossNF-PM1
B1=1097195, B2=216458550
2022-05-27LordJuliusNF
no factor from 2^66 to 2^67
2022-05-27LordJuliusNF
no factor from 2^65 to 2^66
2022-05-27LordJuliusNF
no factor from 2^64 to 2^65
2022-05-27LordJuliusNF
no factor from 2^63 to 2^64
2022-05-27LordJuliusNF
no factor from 2^62 to 2^63
2022-01-11JossNF-PM1
B1=1097195, B2=114656850
2021-08-04JossNF
no factor from 2^67 to 2^68
2021-02-24JossNF
no factor from 2^65 to 2^66
2020-09-10JossNF-PM1
B1=347195, B2=6943918, E=6
2020-06-03JossNF-PM1
B1=347195, B2=3471959, E=6
2019-05-21Chang Chia-TcheC-PRP
M3471959/6943919/1013181637261098449905009 : FCA49F6B741FCFAB
PRP: Verified
PRP without proof (not generated)
2019-05-18JossF-PM1
Factor: 1013181637261098449905009 / (P-1, B1=115730, B2=1157300, E=6)
2017-11-23Oliver KruseC-PRP
M3471959/6943919 : FCA49F6B741FCFAB
PRP: Verified
PRP without proof (not generated)
2017-11-06kkmrkkblmbrbkC-PRP
M3471959/6943919 : FCA49F6B741FCFAB
PRP: Verified
PRP without proof (not generated)