is 21667779-1
has 502,052 decimal digits
takes 0.078 GHz-days to do one L-L test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L2093ECC5921F40B4double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2630.957066.6667%1,000,00040,000,0000.21329.1219%1.170275.7885%12.6306%
PrimeNet2570.011563.1579%7,000120,0000.00092.5688%0.012465.7267%2.5688%
GPU722610.184265.5738%7,00080,0000.00071.2064%0.184966.7802%1.2064%
Difference+2+0.7728+1.0929%+993,000+39,920,000+0.2125+7.9154%+0.9853+9.0083%+9.0083%

Known prime factors (1 factor, 79.9 bits, 0.00479138% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
166777911354881528763420946693532579.910340419250055415644
22 × 61 × 71 × 431 × 15683 × 2907097
15,6832,907,0972012-02-1678,8770.01180.0202

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--3.518%
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--7.839%
2012-02-16T11:13:00AxonManual testing1,000,00024,000,000---0.154--8.407%
2012-02-16T11:13:00AxonManual testing1,000,00032,000,000---0.183--8.810%
2012-02-16T11:13:00AxonManual testing1,000,00040,000,000---0.213--9.122%
2016-03-17T19:18:08alpertronManual testing500,00015,000,00012---0.088--7.320%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-21T00:00:00ANONYMOUSv4_computers?257--0.012--
2001-12-01T00:00:00ANONYMOUSv4_computers?257--0.012--
2010-04-29T16:40:00For Researchi4l_1260261--0.092--
2010-08-22T04:21:00GrunwalderGIMPManual testing21263--0.957--


ECM factoring results:
ECM Summary

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


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15T00:00:00ANONYMOUSv4_computers2093ECC5921F40B40.078
2001-12-01T00:00:00ANONYMOUSv4_computers2093ECC5921F40B40.078


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-02T21:59:00Oliver KruseGTX-0
1135488152876342094669353
CC9BE1808FE4B9__no
2017-11-02T21:17:50ATHec2-1xf
1135488152876342094669353
CC9BE1808FE4B9__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: 2020-01-20T12:09:06+00:00