is 2 6747619 - 1
has 2031236 decimal digits
takes 1.471 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LFC69E51850012F52double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2674.403665.6716 %10000020000000.06433.1580 %4.468066.7557 %
Target2674.403665.6716 %4000045000000.08952.1664 %4.493166.4153 %
Difference---+60000-2500000-0.0251+0.9915%-0.0251+0.3404 %

Known prime factors (1 factor, 78.2 bits, 0.00115881% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
67476193452609084336527282801032478.19225583906592358929
32 × 3359 × 28669 × 29519011
2012-05-2628669295190119,072.30.51710.9497

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-05-13ANONYMOUSv4_computers35000490000--0.0191.789%
2001-08-04Stephen Woodv4_computers3000030000--0.0090.534%
2023-05-11This -Anonymous-Manual testing10000020000006--0.0643.158%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-07-11ANONYMOUSv4_computers212620.046
1998-07-21ANONYMOUSv4_computers212620.046
2004-10-18David Campeauv4_computers212630.145


ECM factoring results:
Total ECM effort:0.332 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.332


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-07-04Michael Kennv4_computersFC69E51850012F521.471
2001-10-20Stephen Woodv4_computersFC69E51850012F521.471


PRP results:
dateuseridcompidcofactorsres64
2018-01-07Oliver KruseGTX-4
345260908433652728280103
E4BD248042C03C5A
2018-12-09kkmrkkblmbrbkc5.large
345260908433652728280103
E4BD248042C03C5A


CERT results:
No CERT results for M6747619


P-1 factor-bounds graph:
B1 = 100000, B2 = 2000000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 35000, B2 = 490000 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
B1 = 30000 (P-1 stage 1)
103
104
105
103
104
105
106
107
108
TF factor-bounds graph:
263
262
this exponent TF target: 67
TF double-checked to: 67
250
260
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280
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Last modified: 2024-02-09T03:30:02+00:00