Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
3267973Factored
FactorDigitsBitsDate
589856587342461849509769085907927259137122.12020-11-18 12:55:51
ECM
DigitsB1Curves
255000015 / 280
Estimated T-Level: 20.3
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Joel Armengaud36EAD8891A68FD5B0
Verified (Factored)1999-11-17Valentine V. Vasiliev36EAD8891A68FD5B131686
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2020-11-18mrh9629B394049980E21326384853
P-1 factors
DateFactorB1B2
2020-11-1858985658734246184950976908590792725914000000150000000
History
DateUserTypeResult
2022-07-17JossNF-PM1
B1=3267973, B2=3273567990
2021-12-22JossNF-PM1
B1=3267973, B2=645134490
2021-12-21JossNF-PM1
B1=3267973, B2=116701200
2021-12-08JossNF
no factor from 2^68 to 2^69
2021-02-22JossNF
no factor from 2^66 to 2^67
2021-02-21JossNF
no factor from 2^65 to 2^66
2021-01-18JossNF-PM1
B1=398000, B2=3267973, E=6
2020-11-18Ben DeloCERT
PRP Certification
Proof certified good
2020-11-18mrhC-PRP
M3267973/5898565873424618495097690859079272591 : 9629B394049980E2
PRP proof power = 7
PRP: Verified
Proof certified good
2020-11-18mikrF-PM1
Factor: 5898565873424618495097690859079272591 / (P-1, B1=4000000, B2=150000000, E=12)
2018-12-17TJAOINF
no factor from 2^67 to 2^68
2017-04-04Gordon SpenceNF
no factor from 2^66 to 2^67
2016-01-16JossNF-PM1
B1=378000, B2=3780000, E=6
2015-06-28ThaNF
no factor from 2^65 to 2^66
2015-02-07VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-07VictordeHollanderNF
no factor from 2^63 to 2^64
2014-10-10JossNF-PM1
B1=99280
2014-06-21JossNF-PM1
B1=79640
2012-12-30dbaughNF
no factor from 2^62 to 2^63
2011-09-20markrNF
no factor from 2^61 to 2^62
2011-09-17USAFSSNF-PM1
B1=60000, B2=1050000, E=6
2009-07-08Carsten KossendeyNF-PM1
B1=15000, B2=191250
2009-04-04S485122NF
no factor from 2^60 to 2^61