is 2 1701019 - 1
has 512058 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-L3647097B3203D83Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26835.040769.1176%100000002000000001.38889.1086%36.429571.9306%2.8130%
PrimeNet2570.011363.1579%80001300000.00102.7316%0.012364.1643%1.0064%
GPU722610.180665.5738%70001000000.00081.3015%0.181466.0218%0.4480%
Difference+7+34.8601+3.5439%+9993000+199900000+1.3880+7.8072%+36.2481+5.9088%+5.9088%

Known prime factors (1 factor, 86.0 bits, 0.00505488% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1701019765419806595056297893180012685.98422498861170717561000
23 × 3 × 53 × 7 × 1071374341462741
2019-12-2912510713743414627416,281,5843,983,3037,439,700

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-01-27T22:35:00Jocelyn LaroucheManual testing5000050000---0.003--0.489%
2011-02-08T05:49:00Carsten 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--0.968%
2014-10-01T23:01:00Jocelyn LaroucheManual testing187733187733---0.013--1.093%
2015-01-07T04:02:00Jocelyn LaroucheManual testing281599281599---0.019--1.344%
2015-02-02T07:32:00Jocelyn LaroucheManual testing309758309758---0.021--1.407%
2015-02-16T20:56:00Jocelyn LaroucheManual testing374806374806---0.026--1.540%
2015-02-18T11:51:00VictordeHollanderManual testing10000000200000000---1.389--9.109%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-01-10T00:00:00ANONYMOUSv4_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--0.938--
2016-02-23T16:28:47Mark RoseManual testing262263--0.577--
2015-02-13T10:43:00VictordeHollanderManual testing263264--1.154--
2015-02-13T10:43:00VictordeHollanderManual testing264265--2.197--
2015-08-30T20:42:00ramgeisManual testing265266--4.393--
2018-06-18T10:05:51TJAOIManual testing266267--8.786--
2019-08-06T10:06:05TJAOIManual testing267268--17.57--


ECM factoring results:

Old Calculation Method

Total ECM effort:32.991 GHz-days
Estimated T-Level:25.430
DigitsB1CurvesCompleteFacMiss
2011000335 / 1003.3503.450%
2550000335 / 2801.19630.163%
3025000055 / 6400.08691.759%

New Calculation Method

Total ECM effort:32.991 GHz-days
Estimated T-Level:25.430
DigitsB1CompleteFacMiss
201100013.6160.000%
25500001.47922.787%
302500000.12288.533%
3510000000.00899.178%


ECM Summary

B1B2factorcurvesGHz-days
50000500000028016.64
250000250000005014.86
2500002500000051.486


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-02-21T00:00:00ANONYMOUSv4_computers3647097B3203D83C0.080
2015-07-03T04:32:00MadPooManual testing3647097B3203D83C0.080


PRP results:
dateuseridcompidcofactorsres64PRP
2019-12-29T15:17:27Christoph ZengerManual testing
76541980659505629789318001
BD4BC69C55C5CCD0no
2019-12-29T23:07:17Niels_Mache_NextcloudSuperDry-X
76541980659505629789318001
BD4BC69C55C5CCD0no


P-1 factor-bounds graph:
B1 = 10000000, B2 = 200000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 374806 (P-1 stage 1)
B1 = 309758 (P-1 stage 1)
B1 = 281599 (P-1 stage 1)
B1 = 187733 (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)
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TF factor-bounds graph:
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Last modified: 2019-12-30T12:40:07+00:00