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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Exponent Range:










MnStatusDetails
3480623Factored
FactorDigitsBitsDate
48554741387487709810555231132892.02022-01-22 16:26:12
ECM
DigitsB1Curves
2550000173 / 280
Estimated T-Level: 23.1
TF below 2^72 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Eric PrestemonF3164F11D1FA6AD20
Verified (Factored)1999-12-01Brian UechiF3164F11D1FA6AD23029221
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2022-01-27riccardo uberti5E0F24B8220C29231319090753
P-1 factors
DateFactorB1B2
2022-01-2248554741387487709810555231135000000405000000
History
DateUserTypeResult
2022-02-15riccardo ubertiNF-PP1
Start=6/5, B1=5000000, B2=100000000
2022-02-02riccardo ubertiNF-PP1
Start=2/7, B1=5000000, B2=100000000
2022-01-27Ben DeloCERT
PRP Certification
Proof certified good
2022-01-27riccardo ubertiC-PRP
M3480623/4855474138748770981055523113 : 5E0F24B8220C2923
PRP proof power = 7
PRP: Verified
Proof certified good
2022-01-22mikrF-PM1
Factor: 4855474138748770981055523113 / (P-1, B1=5000000, B2=405000000)
2021-11-15Aaron HavilandNF-PM1
B1=1500000, B2=30000000, e=12
2021-01-10axnNF
no factor from 2^68 to 2^69
2018-11-05TJAOINF
no factor from 2^67 to 2^68
2017-02-18Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-01-05ramgeisNF
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
2014-09-28HBendtzNF-PM1
B1=500000, B2=10000000, E=12
2014-08-21JossNF-PM1
B1=78440
2012-08-18GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-11-13USAFSSNF-PM1
B1=60000, B2=990000, E=6
2011-07-20markrNF
no factor from 2^61 to 2^62
2009-07-07Carsten KossendeyNF-PM1
B1=20000, B2=240000
2009-03-19S485122NF
no factor from 2^60 to 2^61