is 21661243-1
has 500,084 decimal digits
takes 0.078 GHz-days to do one L-L test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L5B27AB5462F33B2Adouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2630.960766.6667%1,000,00040,000,0000.21329.1182%1.174075.7849%12.6270%
PrimeNet2570.011663.1579%7,000120,0000.00092.5668%0.012565.7247%2.5668%
GPU722610.184965.5738%7,00080,0000.00071.2054%0.185766.7792%1.2054%
Difference+2+0.7758+1.0929%+993,000+39,920,000+0.2125+7.9128%+0.9883+9.0057%+9.0057%

Known prime factors (1 factor, 66.9 bits, 0.00402464% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
16612431338427331653221547032166.85940283911855557
33 × 353 × 3253 × 1299299
3,2531,299,2992012-02-1514.2590.00500.0090

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-02-15T09:11:00AxonManual testing100,000100,000---0.007--1.532%
2012-02-15T09:11:00AxonManual testing200,000200,000---0.014--2.136%
2012-02-15T09:11:00AxonManual testing300,000300,000---0.020--2.542%
2012-02-15T09:11:00AxonManual testing400,000400,000---0.027--2.854%
2012-02-15T09:11:00AxonManual testing500,000500,000---0.034--3.110%
2012-02-15T09:11:00AxonManual testing600,000600,000---0.041--3.327%
2012-02-15T09:11:00AxonManual testing700,000700,000---0.048--3.516%
2012-02-15T09:12:00AxonManual testing800,000800,000---0.055--3.685%
2012-02-15T09:12:00AxonManual testing900,000900,000---0.061--3.836%
2012-02-15T09:12:00AxonManual testing1,000,0001,000,000---0.068--3.975%
2012-02-15T09:12:00AxonManual testing1,000,00016,000,000---0.124--7.836%
2012-02-15T09:12:00AxonManual testing1,000,00024,000,000---0.154--8.403%
2012-02-15T09:12:00AxonManual testing1,000,00032,000,000---0.183--8.806%
2012-02-15T09:12:00AxonManual testing1,000,00040,000,000---0.213--9.118%
2016-03-17T19:18:03alpertronManual testing500,00015,000,00012---0.088--7.316%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-14T00:00:00ANONYMOUSv4_computers?257--0.012--
1998-12-13T00:00:00ANONYMOUSv4_computers?257--0.012--
1999-01-02T00:00:00ANONYMOUSv4_computers?257--0.012--
2003-04-27T00:00:00ANONYMOUSv4_computers?258--0.023--
2010-04-25T11:45:00For Researchi4l_1260261--0.092--
2010-08-22T04:21:00GrunwalderGIMPManual testing21263--0.961--


ECM factoring results:
ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50,0005,000,00025114.88


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-06T00:00:00ANONYMOUSv4_computers5B27AB5462F33B2A0.078
1998-12-13T00:00:00ANONYMOUSv4_computers5B27AB5462F33B2A0.078
1999-01-02T00:00:00ANONYMOUSv4_computers5B27AB5462F33B2A0.078


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-02T20:47:22Oliver KruseGTX-1
133842733165322154703
BB8324595A0EFC__no
2017-11-02T15:03:36ATHec2-1xf
133842733165322154703
BB8324595A0EFC__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: 2019-12-02T14:38:45+00:00