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

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MnStatusDetails
2972029Factored
FactorDigitsBitsDate
7546664156126716671772169.42021-05-28 10:58:04
ECM
DigitsB1Curves
255000071 / 280
Estimated T-Level: 21.3 ⓘ
TF below 2^66 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-01-16Walter Welton-Lair151DDF53434BF5C70
Verified (Factored)1999-05-23Anders Berglund151DDF53434BF5C72476800
Verified (Factored)2018-10-18kkmrkkblmbrbk151DDF53434BF5C71686276
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-05-30kutens60CE92B5D21124FD168648553
History
DateUserTypeResult
2021-05-30curtiscCERT
PRP Certification
Proof certified good
2021-05-30kutensC-PRP
M2972029/754666415612671667177 : 60CE92B5D21124FD
PRP proof power = 7
PRP: Verified
Proof certified good
2021-05-28daveward2005F-ECM
Factor: 754666415612671667177 / (ECM curve 4, B1=50000, B2=5000000, Sigma=631462294202522)
2021-05-17TJAOINF
no factor from 2^68 to 2^69
2018-12-25chuenkitNF
no factor from 2^67 to 2^68
2018-10-18kkmrkkblmbrbkC-LL
151DDF53434BF5C7
2017-12-03Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-28ramgeisNF
no factor from 2^65 to 2^66
2015-05-08VictordeHollanderNF-PM1
B1=1000000, B2=20000000, E=12
2015-04-29VictordeHollanderNF
no factor from 2^64 to 2^65
2015-04-29VictordeHollanderNF
no factor from 2^63 to 2^64
2013-01-07dbaughNF
no factor from 2^62 to 2^63
2011-11-29Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-10-27markrNF-PM1
B1=95000, B2=1995000, E=6
2009-02-12Sturle SundeNF
no factor from 2^60 to 2^61