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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
7916549Factored
FactorDigitsBitsDate
1283125230673408929672166.82016-08-16 07:28:07
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)tm321E26CFADF3F0F87654478
Verified (Factored)1999-12-15Binary Digits321E26CFADF3F0F82149441
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2018-06-09_p95holder_051AFE1593503C6D1471104353
Verified2019-11-17ATH051AFE1593503C6D1117432753
History
DateUserTypeResult
2019-11-17ATHC-PRP
M7916549/128312523067340892967 : 051AFE1593503C6D
PRP: Verified
PRP without proof (not generated)
2018-06-09_p95holder_C-PRP
M7916549/128312523067340892967 : 051AFE1593503C6D
PRP: Verified
PRP without proof (not generated)
2016-08-16Gordon SpenceF
Factor: 128312523067340892967 / TF: 66-67
2015-06-03VictordeHollanderNF
no factor from 2^65 to 2^66
2013-12-19David CampeauNF
no factor from 2^64 to 2^65
2013-10-01NesowaNF
no factor from 2^63 to 2^64
2012-10-13NesowaNF-PM1
B1=100000, B2=1925000, E=6
2009-08-13Carsten KossendeyNF-PM1
B1=45000, B2=708750, E=6