is 2 79640831 - 1
has 23974280 decimal digits
takes 248.518 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
Actual27596.080264.0000 %6700006700003.03161.5689 %99.111864.5648 %
Target27596.080264.0000 %5000008500000023.09323.7807 %119.173465.3610 %
Difference---+170000-84330000-20.0616-2.2117 %-20.0616-0.7962 %

Known prime factors (1 factor, 81.2 bits, 0.00010190% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
7964083126828746187678030264686312581.15016843587548501365
5 × 1061 × 11587 × 14779 × 18541
2016-10-2714779185417,939.50.06780.1361

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-10-27Brian Beuninghp8300d67000067000012581.1503.0321.569%


Trial Factoring results:
57585960616263646566676869707172737475
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2009-05-28Architects Cubedm1_082632640.025
2010-11-29Architects Cubedm1_572642650.047
2011-02-10frolyarfrol-work2652660.094
2011-02-13tmorrowteapot2662670.188
2011-02-17tmorrowteapot2672680.375
2011-02-20ANONYMOUSwtadj12682690.751
2011-02-26ANONYMOUSwtadj12692701.501
2013-01-21frmardev8162702713.003
2016-02-28GregManual testing2712726.005
2016-08-28ixfd64Manual testing27227312.01
2016-09-021997rj7Manual testing27327572.06


ECM factoring results:
No ECM results for M79640831


Lucas-Lehmer results:
No L-L results for M79640831


PRP results:
No PRP results for M79640831


CERT results:
No CERT results for M79640831


P-1 factor-bounds graph:
B1 = 670000 (P-1 stage 1)
103
104
105
106
103
104
105
106
TF factor-bounds graph:
275
273
272
271
270
269
268
267
266
265
264
this exponent TF target: 75
TF double-checked to: 67
250
260
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280
290
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Last modified: 2024-03-13T02:15:48+00:00