is 21670287-1
has 502,807 decimal digits
takes 0.079 GHz-days to do one L-L test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L834EDFC2ABF6652Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2630.955566.6667%1,000,00040,000,0000.21329.1233%1.168875.7899%12.6320%
PrimeNet2570.011563.1579%7,000120,0000.00092.5696%0.012465.7275%2.5696%
GPU722610.183965.5738%7,00080,0000.00071.2068%0.184766.7806%1.2068%
Difference+2+0.7716+1.0929%+993,000+39,920,000+0.2125+7.9164%+0.9841+9.0093%+9.0093%

Known prime factors (1 factor, 69.5 bits, 0.00415873% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
16702878135298376244937959292169.463243529955517972
22 × 3 × 23 × 47 × 3001 × 6255751
3,0016,255,7512012-02-17141.390.02350.0434

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-02-17T11:09:00AxonManual testing100,000100,000---0.007--1.534%
2012-02-17T11:09:00AxonManual testing200,000200,000---0.014--2.138%
2012-02-17T11:09:00AxonManual testing300,000300,000---0.020--2.545%
2012-02-17T11:10:00AxonManual testing400,000400,000---0.027--2.857%
2012-02-17T11:10:00AxonManual testing500,000500,000---0.034--3.112%
2012-02-17T11:10:00AxonManual testing600,000600,000---0.041--3.329%
2012-02-17T11:10:00AxonManual testing700,000700,000---0.048--3.519%
2012-02-17T11:10:00AxonManual testing800,000800,000---0.055--3.687%
2012-02-17T11:10:00AxonManual testing900,000900,000---0.061--3.839%
2012-02-17T11:10:00AxonManual testing1,000,0001,000,000---0.068--3.978%
2012-02-17T11:11:00AxonManual testing1,000,00016,000,000---0.124--7.840%
2012-02-17T11:11:00AxonManual testing1,000,00024,000,000---0.154--8.408%
2012-02-17T11:11:00AxonManual testing1,000,00032,000,000---0.183--8.811%
2012-02-17T11:11:00AxonManual testing1,000,00040,000,000---0.213--9.123%
2016-03-17T19:18:10alpertronManual testing500,00015,000,00012---0.088--7.321%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-14T00:00:00Stephen Woodv4_computers?257--0.011--
2010-04-25T08:50:00For Researchm1_f2260261--0.092--
2010-08-31T00:27:00GrunwalderGIMPManual testing21263--0.956--


ECM factoring results:
ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50,0005,000,00025114.89


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-28T00:00:00Stephen Woodv4_computers834EDFC2ABF6652D0.079


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-02T22:26:52Oliver KruseGTX-3
813529837624493795929
BE8E41299B0521__no
2017-11-02T22:54:16ATHec2-1xf
813529837624493795929
BE8E41299B0521__no


P-1 factor-bounds graph:
B1 = 1,000,000, B2 = 40,000,000 (stage 2)
B1 = 1,000,000, B2 = 32,000,000 (stage 2)
B1 = 1,000,000, B2 = 24,000,000 (stage 2)
B1 = 1,000,000, B2 = 16,000,000 (stage 2)
B1 = 500,000, B2 = 15,000,000 (stage 2)
B1 = 1,000,000 (stage 1)
B1 = 900,000 (stage 1)
B1 = 800,000 (stage 1)
B1 = 700,000 (stage 1)
B1 = 600,000 (stage 1)
B1 = 500,000 (stage 1)
B1 = 400,000 (stage 1)
B1 = 300,000 (stage 1)
B1 = 200,000 (stage 1)
B1 = 100,000 (stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
TF factor-bounds graph:
263
261
257
250
260
270
280
290
2100
Last modified: 2019-12-23T11:27:28+00:00