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
14071429Factored
FactorDigitsBitsDate
1947423513715158609910312477.42021-08-04 12:59:19
ECM
DigitsB1Curves
255000047 / 280
Estimated T-Level: 20.8 ⓘ
TF below 2^64 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2002-08-17Brandon Harris73361FD34C468DC9260060
Verified (Factored)2005-04-02Ars Technica Team Prime Rib73361FD34C468DC98019112
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-12-21PerigA75C94F3CF94AB9A11345531853
History
DateUserTypeResult
2022-12-21curtiscCERT
PRP Certification
Proof certified good
2022-12-21PerigC-PRP
M14071429/194742351371515860991031 : A75C94F3CF94AB9A
PRP proof power = 8
PRP: Verified
Proof certified good
2021-08-04masserF-PP1
Start=2/7, B1=2400000, B2=148800000, Factor: 194742351371515860991031
2021-06-22masserNF
no factor from 2^71 to 2^72
2021-03-28masserNF-PM1
B1=9000000, B2=270000000
2020-11-18masserNF-PM1
B1=580000, B2=13600000, e=12
2020-10-07masserNF
no factor from 2^70 to 2^71
2020-06-09masserNF
no factor from 2^69 to 2^70
2018-01-24ramgeisNF
no factor from 2^68 to 2^69
2018-01-24ramgeisNF
no factor from 2^67 to 2^68
2015-08-23ThaNF
no factor from 2^66 to 2^67
2014-07-22NesowaNF
no factor from 2^65 to 2^66