is 21679101-1
has 505,460 decimal digits
takes 0.079 GHz-days to do one L-L test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-LF6A525C9445F5848double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2630.950566.6667%1,000,00040,000,0000.21329.1281%1.163875.7948%12.6369%
PrimeNet2570.011463.1579%8,000130,0000.00102.7249%0.012465.8828%2.7249%
GPU722610.182965.5738%7,00090,0000.00081.2553%0.183766.8290%1.2553%
Difference+2+0.7676+1.0929%+993,000+39,910,000+0.2125+7.8729%+0.9800+8.9658%+8.9658%

Known prime factors (1 factor, 74.3 bits, 0.00442412% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
1679101230214942803963098860072374.2856855303606035703
3 × 7 × 13 × 337 × 49999 × 1490297
49,9991,490,2972012-02-183,138.20.00880.0103

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-01-24T01:11:00Jocelyn LaroucheManual testing50,00050,000---0.003--1.046%
2012-02-18T13:08:00AxonManual testing100,000100,000---0.007--1.535%
2012-02-18T13:08:00AxonManual testing200,000200,000---0.014--2.140%
2012-02-18T13:08:00AxonManual testing300,000300,000---0.020--2.547%
2012-02-18T13:09:00AxonManual testing400,000400,000---0.027--2.859%
2012-02-18T13:09:00AxonManual testing500,000500,000---0.034--3.114%
2012-02-18T13:09:00AxonManual testing600,000600,000---0.041--3.332%
2012-02-18T13:09:00AxonManual testing700,000700,000---0.048--3.521%
2012-02-18T13:09:00AxonManual testing800,000800,000---0.055--3.690%
2012-02-18T13:09:00AxonManual testing900,000900,000---0.061--3.842%
2012-02-18T13:09:00AxonManual testing1,000,0001,000,000---0.068--3.981%
2012-02-18T13:10:00AxonManual testing1,000,00016,000,000---0.124--7.845%
2012-02-18T13:10:00AxonManual testing1,000,00024,000,000---0.154--8.413%
2012-02-18T13:10:00AxonManual testing1,000,00032,000,000---0.183--8.816%
2012-02-18T13:10:00AxonManual testing1,000,00040,000,000---0.213--9.128%
2016-03-17T19:18:37alpertronManual testing500,00015,000,00012---0.088--7.325%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-14T00:00:00ANONYMOUSv4_computers?257--0.011--
2003-03-27T00:00:00ANONYMOUSv4_computers?258--0.023--
2010-04-27T21:30:00For Researchm1_f2260261--0.091--
2010-09-13T18:09:00GrunwalderGIMPManual testing21263--0.951--


ECM factoring results:
ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50,0005,000,00025114.90


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-29T00:00:00ANONYMOUSv4_computersF6A525C9445F58480.079


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-02T23:54:51Oliver KruseGTX-1
23021494280396309886007
3BAE5E22245521__no
2017-11-03T01:11:04ATHec2-1xf
23021494280396309886007
3BAE5E22245521__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)
B1 = 50,000 (stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
263
261
258
257
250
260
270
280
290
2100
Last modified: 2020-01-06T12:25:44+00:00