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

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Exponent Range:










MnStatusDetails
1959773Factored
FactorDigitsBitsDate
49672511502756437905513094975807998380139128.52022-12-27 21:34:43
ECM
DigitsB1Curves
2550000280 / 280
3025000057 / 640
Estimated T-Level: 25.4
TF below 2^80 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)CalkinsD08E61C5F92C18090
Verified (Factored)1999-01-29Per M. HansenD08E61C5F92C18091664747
Verified (Factored)2015-06-28MadPooD08E61C5F92C1809240772
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2022-12-27LordJuliusE735441AD6380C11143253653
P-1 factors
DateFactorB1B2
2022-12-2749672511502756437905513094975807998380140000000153682214400
History
DateUserTypeResult
2022-12-27StavtsevCERT
PRP Certification
Proof certified good
2022-12-27LordJuliusC-PRP
M1959773/496725115027564379055130949758079983801 : E735441AD6380C11
PRP proof power = 7
PRP: Verified
Proof certified good
2022-12-27RichD0F-PM1
Factor: 496725115027564379055130949758079983801 / (P-1, B1=40000000, B2=153682214400)
2022-12-19JossNF-PM1
B1=1959773, B2=914023110
2022-08-15masserNF-PP1
Start=2/7, B1=1500000, B2=52500000
2019-05-13chuenkitNF
no factor from 2^67 to 2^68
2018-11-26JossNF-PM1
B1=1959773, B2=244971625, E=12
2018-05-16JossNF-PM1
B1=1959773, B2=195977300, E=12
2018-03-04JossNF-PM1
B1=1959773, B2=120000000, E=12
2018-02-13JossNF-PM1
B1=1959773, B2=60000000, E=12
2018-01-28JossNF-PM1
B1=1959773, B2=30000000, E=12
2018-01-08TJAOINF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-09-08ramgeisNF
no factor from 2^65 to 2^66
2015-06-28MadPooC-LL
D08E61C5F92C1809
2015-04-20lycornNF
no factor from 2^64 to 2^65
2015-04-20lycornNF
no factor from 2^63 to 2^64
2011-08-27GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-05-07kurlyNF-PM1
B1=1000000, B2=30000000, E=12
2010-01-11S485122NF
no factor from 2^60 to 2^61