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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MnStatusDetails
1769227Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
276606117500226458748732012684.52018-07-04 18:03:44
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
BadDirk Swanson4312FE36F2D3644B0
Verified (Factored)1998-11-28Nuutti Kuosa36BACBDA0AB7C33D948669
Verified (Factored)1999-03-01Ethan Hansen36BACBDA0AB7C33D1366658
Verified (Factored)2015-07-18MadPoo36BACBDA0AB7C33D1715305
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2018-07-05_p95holder_7C64001F7EB6CD72123189253
Verified2018-07-05_p95holder_7C64001F7EB6CD721982553
Verified2018-07-05Battlemaxx7C64001F7EB6CD72136886153
P-1 factors
DateFactorB1B2
2018-07-04276606117500226458748732011769227176922700
History
DateUserTypeResult
2018-07-05BattlemaxxC-PRP
M1769227/27660611750022645874873201 : 7C64001F7EB6CD72
PRP: Verified
PRP without proof (not generated)
2018-07-05_p95holder_C-PRP
M1769227/27660611750022645874873201 : 7C64001F7EB6CD72
PRP: Verified
PRP without proof (not generated)
2018-07-05_p95holder_C-PRP
M1769227/27660611750022645874873201 : 7C64001F7EB6CD72
PRP: Verified
PRP without proof (not generated)
2018-07-04JossF-PM1
Factor: 27660611750022645874873201 / (P-1, B1=1769227, B2=176922700, E=12)
2018-03-26TJAOINF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2015-09-10ramgeisNF
no factor from 2^65 to 2^66
2015-07-18MadPooC-LL
36BACBDA0AB7C33D
2015-05-11mikrNF-PM1
B1=2475400, B2=86660000, E=12
2015-04-30snme2pm1NF
no factor from 2^64 to 2^65
2015-04-30snme2pm1NF
no factor from 2^63 to 2^64
2014-09-18JossNF-PM1
B1=172556
2014-05-09JossNF-PM1
B1=136278
2014-04-08JossNF-PM1
B1=100000
2011-02-11Carsten KossendeyNF-PM1
B1=95000, B2=1615000, E=6
2010-12-13GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-21Architects CubedNF
no factor from 2^60 to 2^61