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
2246393Factored
FactorDigitsBitsDate
1211769182264566548892166.72015-12-05 15:02:09
ECM
DigitsB1Curves
255000085 / 280
Estimated T-Level: 21.5 ⓘ
TF below 2^66 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Alex and Nick Myrman38BE0
Verified (Factored)nphan5F28F22171F138BE0
BadJohn Borleis IIIB1BD1B091B549DCC0
Verified (Factored)2002-06-09S574835F28F22171F138BE922483
Verified (Factored)2002-06-23Mikus Grinbergs5F28F22171F138BE1523122
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-30alpertron8F1D12D4FEA4DD4C1013
Verified2017-10-29Oliver Kruse8F1D12D4FEA4DD4C1105064313
P-1 factors
DateFactorB1B2
2015-12-05121176918226456654889100000010000000
History
DateUserTypeResult
2017-10-29Oliver KruseC-PRP
M2246393/121176918226456654889 : 8F1D12D4FEA4DD4C
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M2246393/121176918226456654889 : 8F1D12D4FEA4DD4C
PRP: Verified
PRP without proof (not generated)
2016-04-30alpertronNF-PM1
B1=500000, B2=15000000, E=12
2015-12-05Alexander DubrovinF-PM1
Factor: 121176918226456654889 / (P-1, B1=1000000, B2=10000000, E=12)
2015-10-27ramgeisNF
no factor from 2^65 to 2^66
2015-03-10VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-10VictordeHollanderNF
no factor from 2^63 to 2^64
2013-12-04LaurVNF
no factor from 2^62 to 2^63
2012-05-03Sebastian HornbostelNF
no factor from 2^61 to 2^62
2012-01-07Squeeky_SquirrelNF-PM1
B1=150000, B2=3262500, E=6
2011-01-18JossNF-PM1
B1=50000
2009-01-10Sturle SundeNF
no factor from 2^60 to 2^61