is 2 62947463 - 1
has 18949075 decimal digits
takes 147.868 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
Actual27330.387964.3836 %----30.387964.3836 %
Target27460.778764.8649 %4000006500000013.35073.7290 %74.129466.1750 %
Difference-1-30.3908-0.4813 %-400000-65000000-13.3507-3.7290 %-43.7415-1.7915 %

Known prime factors (1 factor, 94.0 bits, 0.00014926% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
62947463191695757353475500173602436492993.953152266468112841577248
25 × 32 × 13 × 37 × 1433 × 2447 × 11941 × 26251
2013-08-01119412625148,752,4080.04330.0828

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2013-08-01exhopp90072993.9532.1630.000%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-07-21Gordon Spencev4_computers212590.001
2022-03-30LordJuliusManual testing21263
2009-02-07Wojciech Florekarmada42632640.031
2009-08-16arnaudSRV-2402642650.059
2009-08-25Team_Elteor_Borislavj~ElteorHW42652660.119
2009-08-30Robert M.elbandito2662670.237
2009-09-03Robert M.elbandito2672680.475
2009-09-08Robert M.elbandito2682690.950
2011-12-19ANONYMOUS30002692701.899
2013-03-07garoManual testing2702713.799
2013-04-07kdgehmanManual testing27127322.79


ECM factoring results:
No ECM results for M62947463


Lucas-Lehmer results:
No L-L results for M62947463


PRP results:
No PRP results for M62947463


CERT results:
No CERT results for M62947463


P-1 factor-bounds graph:
103
104
105
103
104
105
TF factor-bounds graph:
273
271
270
269
268
267
266
265
264
263
259
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