is 2 13679 - 1
has 4118 decimal digits
takes 0.000 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
Actual2672,172.228879.1045%10000000002480162209024503,864.500928.0900%6,036.729784.9740%
Target2440.000268.1818%500100000.00001.3907%0.000268.6243%
Difference+23+2,172.2286+10.9227%+999999500+248016220892450+3,864.5009+26.6993%+6,036.7295+16.3497%

Known prime factors (5 factors, 153.5 bits, 1.12247773% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
13679109433616.7404
22
-446.388e-131.144e-92.328e-9
13679246223617.9109
32
2008-08-26991.279e-122.574e-95.238e-9
13679100157639926.5783661
7 × 523
2008-08-2675231.171e-91.004e-81.518e-8
13679312975521928.22111440
24 × 5 × 11 × 13
2008-08-2616163.859e-94.576e-99.312e-9
13679197059224178160821212064.095720298355794140
22 × 3 × 5 × 12004972596569
2008-08-29512004972596569363.08187.04349.35

26 Composite Factors:
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2021-08-27Seth_TrManual testing400000000400000000-
skipped known factor: 109433
skipped known factor: 246223
skipped known factor: 100157639
skipped known factor: 312975521
--0.114--7.823%
2022-03-03Ethan O'ConnorManual testing1000000000248016220902450-
skipped known factor: 109433
skipped known factor: 246223
skipped known factor: 100157639
skipped known factor: 312975521
skipped known factor: 19705922417816082121
--3,865--28.090%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-08-26ANONYMOUSManual testing??26.57895.17901e-100.0003.39816e-8
2008-08-26ANONYMOUSManual testing??17.91062.48668e-150.0001.63162e-13
2008-08-26ANONYMOUSManual testing??28.22191.24489e-90.0008.16802e-8


ECM factoring results:
Total ECM effort:25.344 GHz-days
Estimated T-Level:37.068
DigitsB1CompleteFacMiss
2011000600.2670.000%
2550000129.5370.000%
3025000023.1170.000%
3510000003.3643.461%
4030000000.41466.127%
45110000000.04495.720%
50440000000.00499.591%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000001480.030
250000250000005510.567
50000050000000100.021
10000001000000001,4215.848
30000003000000002823.481
30000005280000001,00015.40


Lucas-Lehmer results:
No L-L results for M13679


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-21Oliver KrusePRP
109433
246223
100157639
312975521
19705922417816082121
A499E92412B30409no
2017-09-21Oliver KruseManual testing
109433
246223
100157639
312975521
19705922417816082121
A499E92412B30409no
2017-10-02kkmrkkblmbrbkManual testing
109433
246223
100157639
312975521
19705922417816082121
A499E92412B304__no
2017-12-07ATHManual testing
109433
246223
100157639
312975521
19705922417816082121
A499E92412B304__no
2020-04-17Oliver KruseManual testing
109433
246223
100157639
312975521
19705922417816082121
A2D1D21DD345B3__no


P-1 factor-bounds graph:
B1 = 1000000000, B2 = 248016220902450 (P-1 stage 2)
B1 = 1000000000 (P-1 stage 1)
B1 = 400000000 (P-1 stage 1)
100
101
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103
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105
106
107
108
109
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
1015
TF factor-bounds graph:
2
this exponent TF target: 44
TF double-checked to: 67.7
ECM T-Level=37.07 ~= 107-bit
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2100
2110
Last modified: 2023-03-23T17:39:31+00:00