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

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Exponent Range:










MnStatusDetails
2017397Factored
FactorDigitsBitsDate
65582526268074192232492272.52017-10-02 11:08:11
ECM
DigitsB1Curves
2550000280 / 280
30250000112 / 640
Estimated T-Level: 25.9 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Roger GariépyEB0402072DBDEA6D0
Verified (Factored)1999-01-29Cornelius CaesarEB0402072DBDEA6D992507
Verified (Factored)2016-07-15Mark RoseEB0402072DBDEA6D99869
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-05Oliver KruseFCC3EC478C22558B1013
Verified2017-11-13kkmrkkblmbrbkFCC3EC478C22558B1185435613
History
DateUserTypeResult
2017-11-13kkmrkkblmbrbkC-PRP
M2017397/6558252626807419223249 : FCC3EC478C22558B
PRP: Verified
PRP without proof (not generated)
2017-10-05Oliver KruseC-PRP
M2017397/6558252626807419223249 : FCC3EC478C22558B
PRP: Verified
PRP without proof (not generated)
2017-10-02Sid & AndyF-ECM
Factor: 6558252626807419223249 / (ECM curve 63, B1=50000, B2=5000000)
2016-07-16Gordon SpenceNF
no factor from 2^66 to 2^67
2016-07-15Mark RoseC-LL
EB0402072DBDEA6D
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-10-28ramgeisNF
no factor from 2^65 to 2^66
2015-03-15VictordeHollanderNF
no factor from 2^64 to 2^65
2015-03-15VictordeHollanderNF
no factor from 2^63 to 2^64
2013-10-16David CampeauNF-PM1
B1=640000, B2=14080000, E=12
2013-06-06David CampeauNF
no factor from 2^62 to 2^63
2012-02-03Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-12-07JossNF-PM1
B1=201739
2009-01-03Sturle SundeNF
no factor from 2^60 to 2^61