is 2 1700471 - 1
has 511893 decimal digits
takes 0.080 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L4F15E7A3A740ECA0double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26835.052069.1176%100000002000000001.38889.1084%36.440871.9305%2.8129%
PrimeNet2570.011363.1579%80001300000.00102.7314%0.012364.1642%1.0063%
GPU722610.180665.5738%70001000000.00081.3014%0.181566.0218%0.4480%
Difference+7+34.8713+3.5439%+9993000+199900000+1.3880+7.8070%+36.2593+5.9087%+5.9087%

Known prime factors (1 factor, 100.1 bits, 0.00588414% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1700471131966937696627132587852477536131100.058388030544762677906850080
25 × 5 × 9839 × 246487539868557467
2019-12-1998392464875398685574671.033e+11916,425,2681.712e+9

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-01-27T22:35:00Jocelyn LaroucheManual testing5000050000---0.003--0.488%
2011-02-08T15:59:00Carsten Kossendeyleela900001507500---0.011--2.082%
2014-03-31T21:13:00Jocelyn LaroucheManual testing100000100000---0.007--0.765%
2014-05-03T00:50:00Jocelyn LaroucheManual testing150000150000---0.010--0.967%
2014-10-01T23:01:00Jocelyn LaroucheManual testing187745187745---0.013--1.093%
2015-01-05T22:25:00Jocelyn LaroucheManual testing281617281617---0.019--1.344%
2015-02-02T07:32:00Jocelyn LaroucheManual testing309778309778---0.021--1.407%
2015-02-11T12:22:00Jocelyn LaroucheManual testing431911431911---0.029--1.643%
2015-02-15T11:05:00VictordeHollanderManual testing10000000200000000---1.389--9.108%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-21T00:00:00ANONYMOUSv4_computers21257--0.011--
2003-02-09T00:00:00ANONYMOUSv4_computers21258--0.023--
2016-02-23T16:28:47Mark RoseManual testing258260--0.068--
2010-04-21T13:12:00Architects Cubeda3_bu2260261--0.090--
2016-02-23T16:28:47Mark RoseManual testing261262--0.181--
2010-10-04T14:38:00GrunwalderGIMPManual testing21263--0.939--
2016-02-23T16:28:47Mark RoseManual testing262263--0.577--
2015-02-13T10:43:00VictordeHollanderManual testing263264--1.155--
2015-02-13T10:43:00VictordeHollanderManual testing264265--2.197--
2015-08-30T20:42:00ramgeisManual testing265266--4.395--
2018-06-18T10:05:51TJAOIManual testing266267--8.789--
2019-08-06T10:06:05TJAOIManual testing267268--17.58--


ECM factoring results:

Old Calculation Method

Total ECM effort:35.190 GHz-days
Estimated T-Level:23.643
DigitsB1CurvesCompleteFacMiss
2011000204 / 1002.04012.870%
2550000204 / 2800.72948.197%
3025000097 / 6400.15285.926%

New Calculation Method

Total ECM effort:35.190 GHz-days
Estimated T-Level:23.643
DigitsB1CompleteFacMiss
201100011.5350.001%
25500001.48122.749%
302500000.14586.472%
3510000000.01198.869%


ECM Summary

B1B2factorcurvesGHz-days
5000050000001076.360
250000250000007522.29
25000025000000226.539


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-21T00:00:00ANONYMOUSv4_computers4F15E7A3A740ECA00.080
2015-07-19T18:02:00MadPooManual testing4F15E7A3A740ECA00.080


PRP results:
dateuseridcompidcofactorsres64PRP
2019-12-19T17:59:26mnd975211backdoor
1319669376966271325878524775361
EB13FFB07CC242B0no
2019-12-21T14:37:59ANONYMOUS
1319669376966271325878524775361
EB13FFB07CC242B0no


P-1 factor-bounds graph:
B1 = 10000000, B2 = 200000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 431911 (P-1 stage 1)
B1 = 309778 (P-1 stage 1)
B1 = 281617 (P-1 stage 1)
B1 = 187745 (P-1 stage 1)
B1 = 90000, B2 = 1507500 (P-1 stage 2)
B1 = 150000 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 90000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
1015
1016
1017
1018
TF factor-bounds graph:
268
267
266
265
264
263
262
261
260
258
257
250
260
270
280
290
2100
2110
Last modified: 2019-12-21T14:37:59+00:00