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

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MnStatusDetails
16741321Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
2515870514888599279132167.82018-02-16 11:54:48
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)2002-12-16S838177CA14FA1AE45C7483283346
Verified (Factored)2006-04-28Eric Bravick7CA14FA1AE45C74816101682
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2024-07-15kutens30FEA0DD665D3F4C1615125153
History
DateUserTypeResult
2024-07-15sixpack768CERT
PRP Certification
Proof certified good
2024-07-15kutensC-PRP
M16741321/251587051488859927913 : 30FEA0DD665D3F4C
PRP proof power = 8
PRP: Verified
Proof certified good
2024-04-27nordiNF-PM1
B1=500000, B2=258009570
2024-03-02nordiNF-PM1
B1=500000
2018-02-16ramgeisF
Factor: 251587051488859927913 / TF: 67-68*
2016-03-15Mark RoseNF
no factor from 2^65 to 2^66
2014-09-16NesowaNF
no factor from 2^66 to 2^67