is 21636501-1
has 492,636 decimal digits
takes 0.073 GHz-days to do one L-L test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L750719930C00EFE5double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2630.975366.6667%1,000,00040,000,0000.20249.1043%1.177675.7709%12.6130%
PrimeNet2570.011763.1579%7,000120,0000.00092.5593%0.012665.7172%2.5593%
GPU722610.187765.5738%6,50070,0000.00061.1193%0.188466.6931%1.1193%
Difference+2+0.7876+1.0929%+993,500+39,930,000+0.2017+7.9850%+0.9893+9.0779%+9.0779%

Known prime factors (1 factor, 63.6 bits, 0.00388552% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
1636501138503621663717653932063.5874231699878696
23 × 3 × 63839 × 2761961
63,8392,761,9612012-02-121.81040.01370.0182

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-02-12T14:09:00AxonManual testing100,000100,000---0.006--1.528%
2012-02-12T14:09:00AxonManual testing200,000200,000---0.013--2.131%
2012-02-12T14:09:00AxonManual testing300,000300,000---0.019--2.537%
2012-02-12T14:09:00AxonManual testing400,000400,000---0.026--2.848%
2012-02-12T14:09:00AxonManual testing500,000500,000---0.032--3.103%
2012-02-12T14:09:00AxonManual testing600,000600,000---0.039--3.320%
2012-02-12T14:10:00AxonManual testing700,000700,000---0.045--3.509%
2012-02-12T14:10:00AxonManual testing800,000800,000---0.052--3.677%
2012-02-12T14:10:00AxonManual testing900,000900,000---0.058--3.829%
2012-02-12T14:10:00AxonManual testing1,000,0001,000,000---0.065--3.967%
2012-02-12T14:11:00AxonManual testing1,000,00024,000,000---0.146--8.390%
2012-02-12T14:11:00AxonManual testing1,000,00032,000,000---0.174--8.792%
2012-02-12T14:11:00AxonManual testing1,000,00040,000,000---0.202--9.104%
2016-03-17T19:17:42alpertronManual testing500,00015,000,00012---0.084--7.304%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-07T00:00:00Olli Heikkiläv4_computers?257--0.012--
1999-01-02T00:00:00Olli Heikkiläv4_computers?257--0.012--
2003-06-09T00:00:00ANONYMOUSv4_computers?258--0.023--
2003-06-17T00:00:00ANONYMOUSv4_computers?258--0.023--
2010-05-02T19:16:00For Researchi4l_1260261--0.094--
2010-07-24T22:47:00GrunwalderGIMPManual testing21263--0.975--


ECM factoring results:
ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50,0005,000,00025114.10


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-21T00:00:00Olli Heikkiläv4_computers750719930C00EFE50.073
1999-01-02T00:00:00Olli Heikkiläv4_computers750719930C00EFE50.073


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-02T16:16:05Oliver KruseGTX-3
13850362166371765393
6170F8656E45FF__no
2017-11-01T23:29:15ATHec2-1xf
13850362166371765393
6170F8656E45FF__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 = 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
258
257
250
260
270
280
290
2100
Last modified: 2019-11-25T15:12:04+00:00