is 2 5116477 - 1
has 1540214 decimal digits
takes 0.709 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LF56D980B23810FCEdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2675.807565.6716%550009212500.02052.2377%5.828066.4398%0.7681%
PrimeNet2610.060062.2951%220005000000.00973.4113%0.069763.5813%1.2862%
GPU722651.425964.6154%360008000000.01562.5395%1.441565.5140%0.8986%
Difference+2+4.3816+1.0563%+19000+121250+0.0049-0.3019%+4.3865+0.9258%+0.9258%

Known prime factors (1 factor, 66.6 bits, 0.00130227% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
51164771142024689812811085592166.63011160264082227
3 × 13 × 89 × 149 × 21579113
2010-07-29149215791133.58640.23630.4413

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-09-03T03:11:00harleeP4_260055000921250---0.021--2.238%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-06-01T00:00:00ANONYMOUSv4_computers21261--0.060--
2008-12-29T09:38:00Sturle Sundedoak.ifi261262--0.060--
2009-07-27T03:15:00GrunwalderGIMPManual testing21263--0.312--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CurvesCompleteFacMiss

New Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-08-02T00:00:00Vassilov4_computersF56D980B23810FCE0.709
2000-11-05T00:00:00ANONYMOUSv4_computersF56D980B23810FCE0.709


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T06:16:06kkmrkkblmbrbkManual testing
114202468981281108559
92D06C8B77B790__no
2018-05-09T03:16:53Ducho_YYZPantalaimon
114202468981281108559
92D06C8B77B790__no


P-1 factor-bounds graph:
B1 = 55000, B2 = 921250 (P-1 stage 2)
B1 = 55000 (P-1 stage 1)
101
102
103
104
105
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
263
262
261
250
260
270
280
290
2100
Last modified: 2018-05-09T03:16:53+00:00