is 2 12853333 - 1
has 3869239 decimal digits
takes 5.250 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
Actual2672.311864.1791 %400000724487402.56197.9798 %4.873667.0375 %
Target2684.637364.7059 %90000120000000.43763.1636 %5.074965.8224 %
Difference-1-2.3255-0.5268 %+310000+60448740+2.1242+4.8162%-0.2013+1.2151 %

Known prime factors (1 factor, 55.7 bits, 0.00043297% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
12853333566015582718505611755.6522201824160
25 × 5 × 449 × 30649
2000-04-27449306490.00050.00120.0018

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2022-05-11nordisweet16_30.8b14400000400000
skipped known factor: 56601558271850561
--0.2372.163%
2022-05-15nordisweet16_30.8b1440000072448740
skipped known factor: 56601558271850561
--3.0047.292%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-04-27delongv4_computers??
55.652
17


ECM factoring results:
No ECM results for M12853333


Lucas-Lehmer results:
No L-L results for M12853333


PRP results:
dateuseridcompidcofactorsres64
2022-05-17Poaooffice-CN3
56601558271850561
EFD808A910D9C7E0


CERT results:
dateuseridcompid
2022-05-17curtiscjckl3w14047l


P-1 factor-bounds graph:
B1 = 400000, B2 = 72448740 (P-1 stage 2)
B1 = 400000 (P-1 stage 1)
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108
TF factor-bounds graph:
this exponent TF target: 68
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00