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

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MnStatusDetails
18403757Factored
FactorDigitsBitsDate
156969850740027879174732373.72023-09-15 02:25:56
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)2003-07-21Ryser Peter02AB1C1E1D8AFA973766917
Verified (Factored)2006-12-18TheJudger02AB1C1E1D8AFA971482565
P-1 factors
DateFactorB1B2
2023-09-15156969850740027879174731000000509085720
History
DateUserTypeResult
2023-09-15alpertronF-PM1
Factor: 15696985074002787917473 / (P-1, B1=1000000, B2=509085720)
2021-11-12-Anonymous-NF
no factor from 2^72 to 2^73
2021-10-08-Anonymous-NF
no factor from 2^71 to 2^72
2021-09-11SRBaseNF
no factor from 2^70 to 2^71
2020-02-15lycornNF
no factor from 2^69 to 2^70
2018-02-04ramgeisNF
no factor from 2^68 to 2^69
2018-02-04ramgeisNF
no factor from 2^67 to 2^68
2016-03-23Mark RoseNF
no factor from 2^66 to 2^67