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
4452229Factored
FactorDigitsBitsDate
588253352898753919442670995568229716137122.12016-12-04 00:40:11
ECM
DigitsB1Curves
25500009 / 280
Estimated T-Level: 20.2
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-11-21Eckard SpechtA1E77CCAFA035E8A0
Verified (Factored)1999-12-08Keith PerkinsA1E77CCAFA035E8A2415620
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-11-17kkmrkkblmbrbk12A2217E7E4CD6731178124453
Verified2018-02-14Oliver Kruse12A2217E7E4CD6731427064153
P-1 factors
DateFactorB1B2
2016-12-045882533528987539194426709955682297161180000068000000
History
DateUserTypeResult
2021-08-07Dylan DelgadoNF-PM1
B1=2340000, B2=201240000
2018-02-14Oliver KruseC-PRP
M4452229/5882533528987539194426709955682297161 : 12A2217E7E4CD673
PRP: Verified
PRP without proof (not generated)
2017-11-17kkmrkkblmbrbkC-PRP
M4452229/5882533528987539194426709955682297161 : 12A2217E7E4CD673
PRP: Verified
PRP without proof (not generated)
2016-12-04mikrF-PM1
Factor: 5882533528987539194426709955682297161 / (P-1, B1=1800000, B2=68000000, E=12)
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-06-24snme2pm1NF
no factor from 2^65 to 2^66
2014-09-15monstNF
no factor from 2^64 to 2^65
2014-09-15JayderNF
no factor from 2^63 to 2^64
2012-05-09Squeeky_SquirrelNF-PM1
B1=135000, B2=2733750, E=6
2012-02-03GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-10-13markrNF
no factor from 2^61 to 2^62
2009-07-20Carsten KossendeyNF-PM1
B1=25000, B2=362500