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

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MnStatusDetails
5938781Factored
FactorDigitsBitsDate
16753784517862402678779643272890.42016-05-09 20:29:25
ECM
DigitsB1Curves
25500004 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-11-28Kevin Scalzo98FDB22938CAE3370
Verified (Factored)2000-12-07Fred Boily98FDB22938CAE3371655226
Verified (Factored)2015-05-02MadPoo98FDB22938CAE3373406617
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-20kkmrkkblmbrbk245330CBCEFDDE371013
Verified2018-09-13rucio245330CBCEFDDE371490123013
History
DateUserTypeResult
2018-09-13rucioC-PRP
M5938781/1675378451786240267877964327 : 245330CBCEFDDE37
PRP: Verified
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M5938781/1675378451786240267877964327 : 245330CBCEFDDE37
PRP: Verified
PRP without proof (not generated)
2016-05-09bamF-ECM
Factor: 1675378451786240267877964327 / (ECM curve 1, B1=50000, B2=5000000)
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-09-20snme2pm1NF
no factor from 2^65 to 2^66
2015-05-02MadPooC-LL
98FDB22938CAE337
2014-11-16NesowaNF-PM1
B1=360000, B2=8910000, E=12
2014-10-01monstNF
no factor from 2^64 to 2^65
2014-09-29NesowaNF
no factor from 2^63 to 2^64
2011-03-17USAFSSNF-PM1
B1=70000, B2=1120000, E=6