is 2 6449 - 1
has 1942 decimal digits
takes 0.000 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2674,607.523380.5970 %380000000001590950795700766501,068,327.887639.2523 %1,072,935.410988.2131 %
Target2440.000470.4545 %500500000.00001.1033 %0.000470.7805 %
Difference+23+4,607.5229+10.1425 %+37999999500+159095079570026650+1,068,327.8876+38.1489%+1,072,935.4105+17.4326 %

Known prime factors (6 factors, 470.3 bits, 7.29235835% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
644951593515.6554
22
-446.774e-134.930e-101.003e-9
64499786113856791239.83275873111
3 × 1481 × 17077
-1481170771.989e-52.873e-73.715e-7
6449126346121475591443.522979579171
979579171
-19795791710.00020.00660.0123
64493384609711465059531858.23226241353011824
24 × 3 × 50593 × 10805741
-50593108057418.07277.846e-50.0001
644919391373823160393705974141416726146506984742137.15415034403646426107695746737026458479227
13 × 29015113 × 39858283101865695608478076783
2016-11-2429015113398582831018656956084780767832.057e+132.676e+174.999e+17
644988668136520858285753879468333751843293163309156062
519
53175.8896874564779102053477584080348406872638638805175691
797 × 8625551793101698215287428291602098668304648903
2021-03-2879786255517931016982152874282916020986683046489032.618e+135.792e+341.082e+35

57 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2021-08-02ViliamF350000000090500000000
skipped known factor: 51593
skipped known factor: 978611385679
skipped known factor: 12634612147559
skipped known factor: 338460971146505953
--0.66646.606%
2023-08-06ANONYMOUSGreatLakes38000000000159095079570076650
skipped known factor: 51593
skipped known factor: 978611385679
skipped known factor: 12634612147559
skipped known factor: 338460971146505953
--4,021,94078.579%


Trial Factoring results:
5758596061626364656667
No TF results for M6449


ECM factoring results:
Total ECM effort:21.527 GHz-days
Estimated T-Level:39.212
DigitsB1CompleteFacMiss
2011000764.7000.000%
2550000201.3050.000%
3025000040.2880.000%
3510000006.4290.161%
4030000000.84243.072%
45110000000.09590.893%
50440000000.00999.068%


ECM Summary

B1B2factorcurvesGHz-days
30000003000000001,5518.252
30000003000000002,27012.08
4300000019865475631811.197


Lucas-Lehmer results:
No L-L results for M6449


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
51593
978611385679
12634612147559
338460971146505953
193913738231603937059741414167261465069847
5972DFD2CD79A60B
2017-09-25George Woltman5972DFD2CD79A6__
2017-10-02kkmrkkblmbrbkManual testing
51593
978611385679
12634612147559
338460971146505953
193913738231603937059741414167261465069847
5972DFD2CD79A60B
2020-04-17Oliver KruseIOS-1
51593
978611385679
12634612147559
338460971146505953
193913738231603937059741414167261465069847
B1A5BC5A1B8889D1
2021-03-28mikrNitron
51593
978611385679
12634612147559
338460971146505953
193913738231603937059741414167261465069847
88668136520858285753879468333751843293163309156062
519
B1A5BC5A1B8889D1
2021-03-29Chad SteenersonLulabelle14
51593
978611385679
12634612147559
338460971146505953
193913738231603937059741414167261465069847
88668136520858285753879468333751843293163309156062
519
B1A5BC5A1B8889D1


CERT results:
No CERT results for M6449


P-1 factor-bounds graph:
B1 = 38000000000, B2 = 159095079570076650 (P-1 stage 2)
B1 = 38000000000 (P-1 stage 1)
B1 = 500000000, B2 = 90500000000 (P-1 stage 2)
B1 = 500000000 (P-1 stage 1)
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TF factor-bounds graph:
this exponent TF target: 44
TF double-checked to: 67
ECM T-Level=39.21 ~= 114-bit
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Last modified: 2024-03-13T02:15:48+00:00