is 2 68563379 - 1
has 20639634 decimal digits
takes 183.312 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
Actual27213.948262.5000 %7300007300002.83002.2354 %16.778263.3383 %
Target27455.800463.5135 %4500007500000017.49063.9397 %73.291164.9510 %
Difference-2-41.8523-1.0135 %+280000-74270000-14.6606-1.7044 %-56.5129-1.6127 %

Known prime factors (1 factor, 90.3 bits, 0.00013163% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
6856337914740956653853842351855873032890.25210749876150250589569
72 × 67 × 24967 × 318781 × 411409
2014-10-053187814114096,023,1431.25542.5151

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2014-10-05Craig MeyersManual testing730000730000612890.2522.8591.785%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2004-03-01mdrgv4_computers212600.001
2004-06-12mdrgv4_computers212610.002
2009-01-061997rj7Manual testing212640.029
2010-01-19unconnectedsaudi-E54052642650.054
2010-04-12Carlos "casep" Sepulvedafirewall2652660.109
2010-04-14unconnectedcan-022662670.218
2010-04-17Penguin66coldcomputing2672680.436
2010-06-19tmorrowteapot2682690.872
2013-05-01SMoffatManual testing2692701.744
2013-06-27SMoffatManual testing2702713.488
2014-08-02krackerManual testing2712726.975


ECM factoring results:
No ECM results for M68563379


Lucas-Lehmer results:
No L-L results for M68563379


PRP results:
No PRP results for M68563379


CERT results:
No CERT results for M68563379


P-1 factor-bounds graph:
B1 = 730000 (P-1 stage 1)
104
105
106
104
105
106
TF factor-bounds graph:
272
271
270
269
268
267
266
265
264
261
260
this exponent TF target: 74
TF double-checked to: 67
250
260
270
280
290
2100
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Last modified: 2024-03-13T02:15:48+00:00