Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
1708229Factored
FactorDigitsBitsDate
1131711809789244698872166.62008-06-27 00:31:06
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Ars Technica Team Prime RibEFA1A478F15ECF420
Verified (Factored)1998-12-21Gary KeyesEFA1A478F15ECF421455256
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-30alpertron625B72A4775541411013
Verified2017-10-18Oliver Kruse625B72A4775541411166029013
History
DateUserTypeResult
2017-10-18Oliver KruseC-PRP
M1708229/113171180978924469887 : 625B72A477554141
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M1708229/113171180978924469887 : 625B72A477554141
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2008-06-27Team_BunduF-ECM
Factor: 113171180978924469887