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

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MnStatusDetails
3454469Factored
FactorDigitsBitsDate
152202219744733133691912373.72021-05-20 13:42:16
ECM
DigitsB1Curves
255000024 / 280
Estimated T-Level: 20.4 ⓘ
TF below 2^63 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Tomas Rikardsson751BDA6289C68A7E0
Bad1999-08-31Jon Kierkegaard8D8999BDABF095FC1024093
Verified (Factored)2000-03-22Entra Juristdata751BDA6289C68A7E2722133
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-05-22kutens5F09A107E9610ECF126054253
History
DateUserTypeResult
2022-04-10JossNF-PM1
B1=1000000, B2=126668850
2021-05-22schweigmonCERT
PRP Certification
Proof certified good
2021-05-22kutensC-PRP
M3454469/15220221974473313369191 : 5F09A107E9610ECF
PRP proof power = 7
PRP: Verified
Proof certified good
2021-05-20daveward2005F-ECM
Factor: 15220221974473313369191 / (ECM curve 2, B1=50000, B2=5000000, Sigma=932725704876777)
2021-01-05axnNF
no factor from 2^68 to 2^69
2019-02-11TJAOINF
no factor from 2^67 to 2^68
2017-02-08Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-04-17Gordon SpenceNF
no factor from 2^65 to 2^66
2015-02-07VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-07VictordeHollanderNF
no factor from 2^63 to 2^64
2014-09-21HBendtzNF-PM1
B1=500000, B2=10000000, E=12
2014-08-21JossNF-PM1
B1=78580
2012-08-18GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-11-06USAFSSNF-PM1
B1=60000, B2=990000, E=6
2011-07-31markrNF
no factor to 2^62
2009-08-16Carsten KossendeyNF-PM1
B1=20000, B2=235000
2009-03-22S485122NF
no factor from 2^60 to 2^61