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

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MnStatusDetails
2226311Factored
FactorDigitsBitsDate
493672343671612925244792375.42015-12-25 17:48:45
ECM
DigitsB1Curves
255000082 / 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)John Lloyd8C647851BD5BCF530
Verified (Factored)1999-02-07David Phillips8C647851BD5BCF531443210
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-30alpertron9055EC4BDAADA6461013
Verified2017-10-27Oliver Kruse9055EC4BDAADA6461170801413
P-1 factors
DateFactorB1B2
2015-12-2549367234367161292524479200000065000000
History
DateUserTypeResult
2017-10-27Oliver KruseC-PRP
M2226311/49367234367161292524479 : 9055EC4BDAADA646
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M2226311/49367234367161292524479 : 9055EC4BDAADA646
PRP: Verified
PRP without proof (not generated)
2016-04-05alpertronNF-PM1
B1=500000, B2=15000000, E=12
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-12-25Alexander DubrovinF-PM1
Factor: 49367234367161292524479 / (P-1, B1=2000000, B2=65000000, E=12)
2015-11-22Alexander DubrovinNF-PM1
B1=1600000, B2=7000000, E=6
2015-11-22Alexander DubrovinNF-PM1
B1=1000000, B2=5000000, E=6
2015-10-25ramgeisNF
no factor from 2^65 to 2^66
2015-05-04Squeeky_SquirrelNF-PM1
B1=160000, B2=4600000, E=6
2015-03-06VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-06VictordeHollanderNF
no factor from 2^63 to 2^64
2014-09-29JossNF-PM1
B1=142660
2014-05-26JossNF-PM1
B1=113830
2013-12-03LaurVNF
no factor from 2^62 to 2^63
2012-04-19Sebastian HornbostelNF
no factor from 2^61 to 2^62
2011-01-13Oscar ÖstlinNF-PM1
B1=85000, B2=1615000, E=6
2010-10-22Oscar ÖstlinNF-PM1
B1=75011
2009-01-11Sturle SundeNF
no factor from 2^60 to 2^61