is 2 2047159 - 1
has 616257 decimal digits
takes 0.135 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
Actual26714.514768.6567 %500000150000000.12305.1374 %14.637770.2670 %
Target2620.300166.1290 %90006000000.00391.3299 %0.304066.5795 %
Difference+5+14.2146+2.5277 %+491000+14400000+0.1191+3.8075%+14.3337+3.6875 %

Known prime factors (2 factors, 63.3 bits, 0.00308999% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
204715969603407826.05317
17
-1174.383e-121.784e-71.940e-7
20471591583518429691237.20438676
22 × 3 × 11 × 293
2008-07-15112931.227e-82.513e-62.874e-6

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-03-17alpertronManual testing5000001500000012
skipped known factor: 69603407
skipped known factor: 158351842969
---8.206%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-07-15J FeitsmaManual testing??
37.204
12


ECM factoring results:
Total ECM effort:145.026 GHz-days
Estimated T-Level:26.109
DigitsB1CompleteFacMiss
201100014.0490.000%
25500002.09512.307%
302500000.22280.103%
3510000000.01998.164%
4030000000.00199.874%


ECM Summary

B1B2factorcurvesGHz-days
500005000000201.514
50000634237870.572
50000672009270.677
500006872258504.245
50000700000070.600
50000703513370.601
50000706309470.602
25000021020414978136.2


Lucas-Lehmer results:
No L-L results for M2047159


PRP results:
dateuseridcompidcofactorsres64
2017-10-06Oliver KruseGTX-1
69603407
158351842969
8D42A3B5C5484A56
2017-11-19kkmrkkblmbrbkc4.xlarge
69603407
158351842969
8D42A3B5C5484A56


CERT results:
No CERT results for M2047159


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
this exponent TF target: 62
TF double-checked to: 67
ECM T-Level=26.11 ~= 70-bit
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260
270
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Last modified: 2024-03-13T02:15:48+00:00