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

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MnStatusDetails
11616343Factored
FactorDigitsBitsDate
212190559133868147859794609185972487137120.72021-08-21 16:36:38
ECM
DigitsB1Curves
25500002 / 280
Estimated T-Level: 20.0 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2001-01-08Aaron B976BE9870A71DDD54369368
Verified (Factored)2004-07-02Ars Technica Team Prime Rib976BE9870A71DDD53847506
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-09-19Yizhe Huang01DF54CE91E925241344798053
P-1 factors
DateFactorB1B2
2021-08-2121219055913386814785979460918597248716189107185673210
History
DateUserTypeResult
2021-09-19curtiscCERT
PRP Certification
Proof certified good
2021-09-19Yizhe HuangC-PRP
M11616343/2121905591338681478597946091859724871 : 01DF54CE91E92524
PRP proof power = 8
PRP: Verified
Proof certified good
2021-08-21LaurVF-PM1
Factor: 2121905591338681478597946091859724871 / (P-1, B1=6189107, B2=185673210)
2021-08-15SRBaseNF
no factor from 2^70 to 2^71
2021-08-06SRBaseNF
no factor from 2^69 to 2^70
2019-11-15riccardo ubertiNF-PM1
B1=430000, B2=8500000, E=12
2018-01-18ramgeisNF
no factor from 2^68 to 2^69
2018-01-18ramgeisNF
no factor from 2^67 to 2^68
2016-01-15VictordeHollanderNF
no factor from 2^66 to 2^67
2014-12-20NesowaNF
no factor from 2^65 to 2^66
2013-11-05lycornNF
no factor from 2^64 to 2^65