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

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MnStatusDetails
3889493Factored
FactorDigitsBitsDate
145995089246403898744732373.62017-11-02 09:15:54
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)Carlo Baffa45B6222FBE5BBC190
Verified (Factored)1999-08-31Stephen Wood45B6222FBE5BBC193112042
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-11-08Yaroslav Berezhko718E41830A92B9031283823353
Verified2017-12-07Yaroslav Berezhko718E41830A92B9031304601453
Verified2018-01-07ATH718E41830A92B9031218438953
History
DateUserTypeResult
2022-05-25JossNF-PM1
B1=100000, B2=130364850
2022-03-22JossNF-PM1
B1=100000
2022-03-05JossNF-PM1
B1=90000
2018-01-07ATHC-PRP
M3889493/14599508924640389874473 : 718E41830A92B903
PRP: Verified
PRP without proof (not generated)
2017-12-07Yaroslav BerezhkoC-PRP
M3889493/14599508924640389874473 : 718E41830A92B903
PRP: Verified
PRP without proof (not generated)
2017-11-08Yaroslav BerezhkoC-PRP
M3889493/14599508924640389874473 : 718E41830A92B903
PRP: Verified
PRP without proof (not generated)
2017-11-02ConductorF-ECM
Factor: 14599508924640389874473 / (ECM curve 3, B1=50000, B2=5000000)
2016-11-29Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-25JossNF-PM1
B1=228096, B2=2280960, E=6
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-15ramgeisNF
no factor from 2^65 to 2^66
2015-01-18VictordeHollanderNF
no factor from 2^64 to 2^65
2015-01-18VictordeHollanderNF
no factor from 2^63 to 2^64
2014-10-28JossNF-PM1
B1=86502
2012-04-20GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-10-12Squeeky_SquirrelNF-PM1
B1=70000, B2=1155000, E=6
2011-02-04markrNF
no factor from 2^61 to 2^62
2009-07-31Carsten KossendeyNF-PM1
B1=20000, B2=275000
2009-02-25S485122NF
no factor from 2^60 to 2^61