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

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MnStatusDetails
16376123Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
129649476853491017869912373.52019-11-29 22:51:33
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)2002-12-25Bryan G. Sheffler3F4767371477A2DF10839362
Verified (Factored)2006-04-28Wada Hiroyuki3F4767371477A2DF1180536
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2024-03-12PerigC91B752888BFF94911351987353
P-1 factors
DateFactorB1B2
2019-11-2912964947685349101786991410000410000
History
DateUserTypeResult
2024-03-12ANONYMOUSCERT
PRP Certification
Proof certified good
2024-03-12PerigC-PRP
M16376123/12964947685349101786991 : C91B752888BFF949
PRP proof power = 8
PRP: Verified
Proof certified good
2024-01-30nordiNF-PM1
B1=500000, B2=266674590
2024-01-03nordiNF-PM1
B1=500000
2019-11-29Aaron HavilandF-PM1
Factor: 12964947685349101786991 / (P-1, B1=410000, B2=410000, e=12, n=864K CUDAPm1 v0.22)
2018-02-11ramgeisNF
no factor from 2^68 to 2^69
2018-02-11ramgeisNF
no factor from 2^67 to 2^68
2016-03-16Mark RoseNF
no factor from 2^65 to 2^66
2014-08-18NesowaNF
no factor from 2^66 to 2^67