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

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MnStatusDetails
4458499Factored
FactorDigitsBitsDate
35223824342085042846307876310511159561739128.02022-08-18 12:21:54
ECM
DigitsB1Curves
255000012 / 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)1998-03-31WilliamF6C17A40C27BA4270
Verified (Factored)1999-12-01Brian DohertyF6C17A40C27BA4273376262
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-08-21LordJulius3F6DEC4588E529801388003153
P-1 factors
DateFactorB1B2
2022-08-18352238243420850428463078763105111595617750000012441625350
History
DateUserTypeResult
2022-08-21curtiscCERT
PRP Certification
Proof certified good
2022-08-21LordJuliusC-PRP
M4458499/352238243420850428463078763105111595617 : 3F6DEC4588E52980
PRP proof power = 7
PRP: Verified
Proof certified good
2022-08-18xssF-PM1
Factor: 352238243420850428463078763105111595617 / (P-1, B1=7500000, B2=12441625350)
2021-08-22SRBaseNF
no factor from 2^70 to 2^71
2021-08-19SRBaseNF
no factor from 2^69 to 2^70
2021-07-20MadPooNF
no factor from 2^68 to 2^69
2021-04-24Architects CubedNF-PM1
B1=222000, B2=13853000
2018-06-24ramgeisNF
no factor from 2^67 to 2^68
2018-06-24ramgeisNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-06-24snme2pm1NF
no factor from 2^65 to 2^66
2014-09-18monstNF
no factor from 2^64 to 2^65
2014-09-17JayderNF
no factor from 2^63 to 2^64
2012-10-11Squeeky_SquirrelNF-PM1
B1=290000, B2=7467500, E=12
2012-02-03GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-10-12markrNF
no factor from 2^61 to 2^62
2009-07-21Carsten KossendeyNF-PM1
B1=25000, B2=362500