is 21666871-1
has 501,779 decimal digits
takes 0.078 GHz-days to do one L-L test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L0DECF81395EB5EA1double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2630.957566.6667%1,000,00040,000,0000.21329.1214%1.170775.7880%12.6301%
PrimeNet2570.011563.1579%7,000120,0000.00092.5685%0.012465.7264%2.5685%
GPU722610.184365.5738%7,00080,0000.00071.2063%0.185066.7800%1.2063%
Difference+2+0.7732+1.0929%+993,000+39,920,000+0.2125+7.9151%+0.9857+9.0080%+9.0080%

Known prime factors (1 factor, 72.3 bits, 0.00433761% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
166687158235610915364567657132272.3021746854163140536
23 × 312 × 59627 × 3810661
59,6273,810,6612012-02-16993.050.01800.0265

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-02-16T11:11:00AxonManual testing100,000100,000---0.007--1.533%
2012-02-16T11:12:00AxonManual testing200,000200,000---0.014--2.137%
2012-02-16T11:12:00AxonManual testing300,000300,000---0.020--2.544%
2012-02-16T11:12:00AxonManual testing400,000400,000---0.027--2.856%
2012-02-16T11:12:00AxonManual testing500,000500,000---0.034--3.111%
2012-02-16T11:12:00AxonManual testing600,000600,000---0.041--3.328%
2012-02-16T11:12:00AxonManual testing700,000700,000---0.048--3.518%
2012-02-16T11:12:00AxonManual testing800,000800,000---0.055--3.686%
2012-02-16T11:13:00AxonManual testing900,000900,000---0.061--3.838%
2012-02-16T11:13:00AxonManual testing1,000,0001,000,000---0.068--3.977%
2012-02-16T11:13:00AxonManual testing1,000,00016,000,000---0.124--7.839%
2012-02-16T11:13:00AxonManual testing1,000,00024,000,000---0.154--8.406%
2012-02-16T11:13:00AxonManual testing1,000,00032,000,000---0.183--8.809%
2012-02-16T11:13:00AxonManual testing1,000,00040,000,000---0.213--9.121%
2016-03-17T19:18:07alpertronManual testing500,00015,000,00012---0.088--7.319%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-03-23T00:00:00ANONYMOUSv4_computers?256--0.006--
1998-11-14T00:00:00Greg Hewgillv4_computers?257--0.012--
2010-04-28T23:30:00For Researchi4l_1260261--0.092--
2010-08-22T04:21:00GrunwalderGIMPManual testing21263--0.957--


ECM factoring results:
ECM Summary

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


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-03-23T00:00:00ANONYMOUSv4_computers0DECF81395EB5EA10.078
1998-11-21T00:00:00Greg Hewgillv4_computers0DECF81395EB5EA10.078


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-02T21:45:54Oliver KruseGTX-1
5823561091536456765713
5CFAB46B3CDF0F__no
2017-11-03T01:29:23Chang Chia-Tchehomura
5823561091536456765713
5CFAB46B3CDF0F__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)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
263
261
257
256
250
260
270
280
290
2100
Last modified: 2019-12-16T13:27:50+00:00