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
17052247Factored
FactorDigitsBitsDate
42048728169811202242067119677505241328139128.32022-03-25 06:25:26
ECM
DigitsB1Curves
25500001 / 280
Estimated T-Level: 20.0
TF below 2^61 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2003-02-09Andy YoungAF6474A1F1DF7B1F6212691
Verified (Factored)2007-02-05Ars Technica Team Prime RibAF6474A1F1DF7B1F272216
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2022-11-16Naegi Makoto8098E7B7C4519E6311388845953
P-1 factors
DateFactorB1B2
2022-03-2542048728169811202242067119677505241328130213773021377
History
DateUserTypeResult
2022-11-16ChelleCERT
PRP Certification
Proof certified good
2022-11-16Naegi MakotoC-PRP
M17052247/420487281698112022420671196775052413281 : 8098E7B7C4519E63
PRP proof power = 8
PRP: Verified
Proof certified good
2022-03-25LaurVF-PM1
Factor: 420487281698112022420671196775052413281 / (P-1, B1=3021377, B2=3021377)
2022-01-31Jon PaceNF
no factor from 2^73 to 2^74
2022-01-11ZacHFXNF
no factor from 2^72 to 2^73
2021-09-17-Anonymous-NF
no factor from 2^71 to 2^72
2021-09-09SRBaseNF
no factor from 2^70 to 2^71
2020-01-19masserNF
no factor from 2^69 to 2^70
2017-10-24ramgeisNF
no factor from 2^68 to 2^69
2016-03-15Mark RoseNF
no factor from 2^65 to 2^66
2016-01-21mikrNF
no factor from 2^67 to 2^68
2014-09-15NesowaNF
no factor from 2^66 to 2^67