is 2 4907971 - 1
has 1477447 decimal digits
takes 0.680 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2676.054265.6716%----6.054265.6716%0.0000%
PrimeNet2610.062662.2951%220004500000.00913.3030%0.071763.5405%1.2454%
GPU722651.486564.6154%320007000000.01372.3746%1.500265.4556%0.8403%
Difference+2+4.5677+1.0563%-32000-700000-0.0137-2.3746%+4.5540+0.2160%+0.2160%

Known prime factors (1 factor, 41.0 bits, 0.00083464% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
490797121444790327991340.964218469
3 × 72823
-3728233.843e-80.00080.0015

P-1 results:
No P-1 results for M4907971


Trial Factoring results:
No TF results for M4907971


ECM factoring results:

Old Calculation Method

Total ECM effort:0.629 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.629 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.629


Lucas-Lehmer results:
No L-L results for M4907971


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T06:41:01kkmrkkblmbrbkManual testing
2144479032799
EA4CD2077A05CA__no
2018-04-05T20:30:27ATHec2-PRPCFDC
2144479032799
EA4CD2077A05CA__no


P-1 factor-bounds graph:
100
101
100
101
102
103
104
105
TF factor-bounds graph:
267
240
250
260
270
280
290
2100
Last modified: 2019-08-05T08:49:43+00:00