is 2 12728029 - 1
has 3831519 decimal digits
takes 5.199 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
Actual2672.334564.1791 %40000042845985014.05019.9900 %16.384667.7576 %
Target2684.683064.7059 %90000120000000.43763.1590 %5.120665.8208 %
Difference-1-2.3484-0.5268 %+310000+416459850+13.6125+6.8310%+11.2640+1.9368 %

Known prime factors (1 factor, 52.9 bits, 0.00041600% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1272802986933720800762631652.949341505039
3 × 59 × 1929407
2000-03-275919294078.671e-50.06230.1163

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2022-05-04nordisweet16_30.8b14400000400000--0.2372.159%
2022-05-04nordisweet16_30.8b14400000428459850
skipped known factor: 8693372080076263
--16.479.183%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-03-27ANONYMOUSv4_computers??
52.949
16


ECM factoring results:
No ECM results for M12728029


Lucas-Lehmer results:
No L-L results for M12728029


PRP results:
dateuseridcompidcofactorsres64
2022-05-20Ember_EdisonMainServer
8693372080076263
C8B01D563983966C


CERT results:
dateuseridcompid
2022-05-20Brian BoyeUtoppia


P-1 factor-bounds graph:
B1 = 400000, B2 = 428459850 (P-1 stage 2)
B1 = 400000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
this exponent TF target: 68
TF double-checked to: 67
250
260
270
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00