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

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MnStatusDetails
12853331Factored
FactorDigitsBitsDate
21292062119924880572572270.92019-10-12 08:13:01
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)2001-10-20Lars Fricke5C9F7DBD3565514D5300363
Verified (Factored)2004-09-16Dave Stephens5C9F7DBD3565514D83931
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2019-10-12theSpirit833B4A1483C40CBB491745783953
Verified2020-10-05Jaytholomew3B4A1483C40CBB491670031853
History
DateUserTypeResult
2020-10-05Runtime ErrorCERT
PRP Certification
Proof certified good
2020-10-05JaytholomewC-PRP
M12853331/2129206211992488057257 : 3B4A1483C40CBB49
PRP proof power = 8
PRP: Verified
Proof certified good
2019-10-12theSpirit83C-PRP
M12853331/2129206211992488057257 : 3B4A1483C40CBB49
PRP: Verified
PRP without proof (not generated)
2019-10-12KeysarecoolF-ECM
Factor: 2129206211992488057257 / (ECM curve 1, B1=50000, B2=5000000, Sigma=4803587679890376)
2018-07-11riccardo ubertiNF-PM1
B1=430000, B2=8500000, E=12
2018-01-07ramgeisNF
no factor from 2^68 to 2^69
2018-01-07ramgeisNF
no factor from 2^67 to 2^68
2015-04-10ThaNF
no factor from 2^66 to 2^67
2014-04-27NesowaNF
no factor from 2^65 to 2^66
2013-06-03lycornNF
no factor from 2^64 to 2^65