is 21648837-1
has 496,350 decimal digits
takes 0.078 GHz-days to do one L-L test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-LF064E326249B5893double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2630.968066.6667%1,000,00040,000,0000.21329.1112%1.181275.7779%12.6200%
PrimeNet2570.011663.1579%7,000120,0000.00092.5631%0.012565.7210%2.5631%
GPU722610.186365.5738%6,50080,0000.00071.1719%0.187066.7457%1.1719%
Difference+2+0.7817+1.0929%+993,500+39,920,000+0.2125+7.9393%+0.9942+9.0322%+9.0322%

Known prime factors (1 factor, 71.6 bits, 0.00434537% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
164883737001459027597586096072271.6481122047207443719
35 × 131 × 6709 × 5253827
6,7095,253,8272012-02-13450.610.02000.0365

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-04-14T00:00:00Jocelyn Larouchev4_computers20,000195,000---0.002--1.609%
2012-02-13T10:06:00AxonManual testing100,000100,000---0.007--1.530%
2012-02-13T10:06:00AxonManual testing200,000200,000---0.014--2.134%
2012-02-13T10:06:00AxonManual testing300,000300,000---0.020--2.540%
2012-02-13T10:06:00AxonManual testing400,000400,000---0.027--2.851%
2012-02-13T10:07:00AxonManual testing500,000500,000---0.034--3.106%
2012-02-13T10:07:00AxonManual testing600,000600,000---0.041--3.323%
2012-02-13T10:07:00AxonManual testing700,000700,000---0.048--3.512%
2012-02-13T10:07:00AxonManual testing800,000800,000---0.055--3.681%
2012-02-13T10:07:00AxonManual testing900,000900,000---0.061--3.833%
2012-02-13T10:08:00AxonManual testing1,000,0001,000,000---0.068--3.971%
2012-02-13T10:08:00AxonManual testing1,000,00016,000,000---0.124--7.829%
2012-02-13T10:08:00AxonManual testing1,000,00024,000,000---0.154--8.397%
2012-02-13T10:08:00AxonManual testing1,000,00032,000,000---0.183--8.799%
2012-02-13T10:08:00AxonManual testing1,000,00040,000,000---0.213--9.111%
2016-03-17T19:17:52alpertronManual testing500,00015,000,00012---0.088--7.310%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-14T00:00:00Stephen Woodv4_computers?257--0.012--
2003-05-19T00:00:00ANONYMOUSv4_computers?258--0.023--
2010-05-01T02:30:00For Researchm1_76l260261--0.093--
2010-08-03T22:36:00GrunwalderGIMPManual testing21263--0.968--


ECM factoring results:
ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50,0005,000,00025114.87


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-10T00:00:00Stephen Woodv4_computersF064E326249B58930.078


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-02T18:16:57Oliver KruseGTX-0
3700145902759758609607
C86DDBEA794C50__no
2017-11-02T06:37:57kkmrkkblmbrbkc4.xlarge
3700145902759758609607
C86DDBEA794C50__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 = 20,000, B2 = 195,000 (stage 2)
B1 = 20,000 (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: 2019-12-02T14:39:37+00:00