is 21645499-1
has 495,345 decimal digits
takes 0.073 GHz-days to do one L-L test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L18F2EBDA3331E073double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2630.969966.6667%1,000,00040,000,0000.20249.1094%1.172375.7760%12.6181%
PrimeNet2570.011763.1579%7,000120,0000.00092.5621%0.012565.7200%2.5621%
GPU722610.186765.5738%6,50080,0000.00071.1714%0.187466.7452%1.1714%
Difference+2+0.7832+1.0929%+993,500+39,920,000+0.2017+7.9380%+0.9850+9.0309%+9.0309%

Known prime factors (1 factor, 80.7 bits, 0.00490401% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
164549919576595255278040059181932580.695594852845710572904
23 × 7 × 13 × 37 × 1873 × 6073 × 1941491
6,0731,941,4912012-02-13255,2320.00720.0128

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-02-13T10:06:00AxonManual testing100,000100,000---0.006--1.530%
2012-02-13T10:06:00AxonManual testing200,000200,000---0.013--2.133%
2012-02-13T10:06:00AxonManual testing300,000300,000---0.019--2.539%
2012-02-13T10:06:00AxonManual testing400,000400,000---0.026--2.850%
2012-02-13T10:07:00AxonManual testing500,000500,000---0.032--3.105%
2012-02-13T10:07:00AxonManual testing600,000600,000---0.039--3.322%
2012-02-13T10:07:00AxonManual testing700,000700,000---0.045--3.512%
2012-02-13T10:07:00AxonManual testing800,000800,000---0.052--3.680%
2012-02-13T10:07:00AxonManual testing900,000900,000---0.058--3.832%
2012-02-13T10:08:00AxonManual testing1,000,0001,000,000---0.065--3.970%
2012-02-13T10:08:00AxonManual testing1,000,00016,000,000---0.118--7.828%
2012-02-13T10:08:00AxonManual testing1,000,00024,000,000---0.146--8.395%
2012-02-13T10:08:00AxonManual testing1,000,00032,000,000---0.174--8.797%
2012-02-13T10:08:00AxonManual testing1,000,00040,000,000---0.202--9.109%
2016-03-17T19:17:49alpertronManual testing500,00015,000,00012---0.084--7.308%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-07T00:00:00ANONYMOUSv4_computers?257--0.012--
2003-05-26T00:00:00ANONYMOUSv4_computers?258--0.023--
2010-04-28T12:40:00For Researchm1_76l260261--0.093--
2010-08-03T22:35:00GrunwalderGIMPManual testing21263--0.970--


ECM factoring results:
ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50,0005,000,00025114.11


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-29T00:00:00ANONYMOUSv4_computers18F2EBDA3331E0730.073


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-02T17:42:08Oliver KruseGTX-2
1957659525527804005918193
2BAE52B963CDDA__no
2017-11-02T04:33:39ATHec2-1xf
1957659525527804005918193
2BAE52B963CDDA__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
258
257
250
260
270
280
290
2100
Last modified: 2019-11-18T17:51:12+00:00