is 21666213-1
has 501,581 decimal digits
takes 0.078 GHz-days to do one L-L test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L560CB6370C08B350double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2630.957966.6667%1,000,00040,000,0000.21329.1210%1.171175.7877%12.6298%
PrimeNet2570.011563.1579%7,000120,0000.00092.5683%0.012465.7262%2.5683%
GPU722610.184465.5738%7,00080,0000.00071.2062%0.185166.7799%1.2062%
Difference+2+0.7735+1.0929%+993,000+39,920,000+0.2125+7.9148%+0.9860+9.0077%+9.0077%

Known prime factors (1 factor, 88.6 bits, 0.00531501% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
16662134560452635720247909595546732788.559136850829867497370072
23 × 3 × 7 × 17 × 857 × 1151 × 38699 × 1255259
38,6991,255,2592012-02-1673,875,4780.00720.0087

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--3.517%
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--7.838%
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
1998-11-14T00:00:00ANONYMOUSv4_computers?257--0.012--
2010-04-28T13:55:00For Researchi4l_1260261--0.092--
2010-08-22T04:21:00GrunwalderGIMPManual testing21263--0.958--


ECM factoring results:
ECM Summary

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


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-21T00:00:00ANONYMOUSv4_computers560CB6370C08B3500.078


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-02T21:39:04Oliver KruseGTX-2
456045263572024790959554673
B2E0CF503CBD98__no
2017-11-02T21:16:01kkmrkkblmbrbkc4.xlarge
456045263572024790959554673
B2E0CF503CBD98__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
250
260
270
280
290
2100
Last modified: 2019-12-09T17:17:17+00:00