is 2 79682131 - 1
has 23986712 decimal digits
takes 248.647 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
Actual27596.030464.0000 %665000126350005.95983.6997 %101.990265.3319 %
Target27596.030464.0000 %5000008500000023.09323.7809 %119.123665.3611 %
Difference---+165000-72365000-17.1334-0.0812 %-17.1334-0.0292 %

Known prime factors (1 factor, 80.0 bits, 0.00010035% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
7968213111749441855702061805708012579.9597372695551843400
23 × 3 × 52 × 107 × 16103 × 7131559
2016-11-021610371315591,616.31.82703.2836

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-11-02Pi_RhoManual testing6650001263500022579.9596.9183.700%


Trial Factoring results:
57585960616263646566676869707172737475
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2009-06-03Architects Cubeda3_pv2632640.025
2010-11-30Architects Cubedm1_162642650.047
2011-02-01dsls12652660.094
2011-03-06Eugene Sitnikovexses212662670.188
2011-03-11Helmut Zuluspcl12672680.375
2011-03-18ANONYMOUS2682690.750
2011-04-06ANONYMOUS2692701.501
2013-01-24FranC2702713.001
2016-02-29DerekManual testing2712726.002
2016-08-25AirSquirrelsManual testing27227584.03


ECM factoring results:
No ECM results for M79682131


Lucas-Lehmer results:
No L-L results for M79682131


PRP results:
No PRP results for M79682131


CERT results:
No CERT results for M79682131


P-1 factor-bounds graph:
B1 = 665000, B2 = 12635000 (P-1 stage 2)
B1 = 665000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
275
272
271
270
269
268
267
266
265
264
this exponent TF target: 75
TF double-checked to: 67
250
260
270
280
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00