Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
2245681Factored
FactorDigitsBitsDate
40960070065729897326412271.82015-12-05 07:06:23
ECM
DigitsB1Curves
2550000118 / 280
Estimated T-Level: 22.1
TF below 2^68 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)nphan0E096984DDA83A070
Verified (Factored)John Borleis III0E096984DDA83A070
Verified (Factored)1999-03-26Alex Outhred0E096984DDA83A07812961
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-30alpertronD530BB4F6C8A3DEF1013
Verified2017-10-29Oliver KruseD530BB4F6C8A3DEF111259513
P-1 factors
DateFactorB1B2
2015-12-054096007006572989732641100000010000000
History
DateUserTypeResult
2017-10-29Oliver KruseC-PRP
M2245681/4096007006572989732641 : D530BB4F6C8A3DEF
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M2245681/4096007006572989732641 : D530BB4F6C8A3DEF
PRP: Verified
PRP without proof (not generated)
2016-04-29alpertronNF-PM1
B1=500000, B2=15000000, E=12
2015-12-05Alexander DubrovinF-PM1
Factor: 4096007006572989732641 / (P-1, B1=1000000, B2=10000000, E=12)
2015-10-26ramgeisNF
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
2014-08-25-Anonymous-NF-PM1
B1=128581
2013-12-04LaurVNF
no factor from 2^62 to 2^63
2012-05-03Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-06markrNF-PM1
B1=100000, B2=2075000, E=6
2010-11-11JossNF-PM1
B1=30000
2009-01-11Sturle SundeNF
no factor from 2^60 to 2^61