is 21655557-1
has 498,373 decimal digits
takes 0.078 GHz-days to do one L-L test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L89DEE62B0EE914F3double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2630.964066.6667%1,000,00040,000,0000.21329.1150%1.177375.7817%12.6238%
PrimeNet2570.011663.1579%7,000120,0000.00092.5651%0.012565.7230%2.5651%
GPU722610.185565.5738%7,00070,0000.00071.1519%0.186366.7257%1.1519%
Difference+2+0.7785+1.0929%+993,000+39,930,000+0.2125+7.9631%+0.9910+9.0560%+9.0560%

Known prime factors (1 factor, 78.8 bits, 0.00475735% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
16555575120764031739983641469032478.761154653812334458543
3533 × 4339 × 21017 × 480017
21,017480,0172012-02-1163,0920.00310.0033

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-02-11T09:09:00AxonManual testing100,000100,000---0.007--1.531%
2012-02-11T09:10:00AxonManual testing200,000200,000---0.014--2.135%
2012-02-11T09:10:00AxonManual testing300,000300,000---0.020--2.541%
2012-02-11T09:10:00AxonManual testing400,000400,000---0.027--2.853%
2012-02-11T09:10:00AxonManual testing500,000500,000---0.034--3.108%
2012-02-11T09:10:00AxonManual testing600,000600,000---0.041--3.325%
2012-02-11T09:10:00AxonManual testing700,000700,000---0.048--3.514%
2012-02-11T09:10:00AxonManual testing800,000800,000---0.055--3.683%
2012-02-11T09:11:00AxonManual testing900,000900,000---0.061--3.835%
2012-02-11T09:11:00AxonManual testing1,000,0001,000,000---0.068--3.973%
2012-02-11T09:11:00AxonManual testing1,000,0008,000,000---0.094--6.863%
2012-02-11T09:11:00AxonManual testing1,000,00016,000,000---0.124--7.833%
2012-02-11T09:12:00AxonManual testing1,000,00024,000,000---0.154--8.400%
2012-02-11T09:12:00AxonManual testing1,000,00032,000,000---0.183--8.803%
2012-02-11T09:12:00AxonManual testing1,000,00040,000,000---0.213--9.115%
2016-03-17T19:17:58alpertronManual testing500,00015,000,00012---0.088--7.313%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-07T00:00:00Massimo Cappelli (ik5pwa)v4_computers?257--0.012--
2003-05-11T00:00:00ANONYMOUSv4_computers?258--0.023--
2010-04-26T22:20:00For Researchm1_tt260261--0.093--
2010-08-13T02:23:00GrunwalderGIMPManual testing21263--0.964--


ECM factoring results:
ECM Summary

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


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-02-14T00:00:00Dry Creek Photov4_computers89DEE62B0EE914F30.078


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-02T19:35:12Oliver KruseGTX-2
512076403173998364146903
022F47157F8E9F__no
2017-11-02T11:33:23ATHec2-1xf
512076403173998364146903
022F47157F8E9F__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 = 1,000,000, B2 = 8,000,000 (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: 2019-11-25T15:13:39+00:00