is 2 1708453 - 1
has 514296 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-L50C35A68ECA407B5double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26717.392368.6567%36422001234567890.69408.6157%18.086371.3572%2.7004%
PrimeNet2570.011263.1579%80001400000.00102.7897%0.012364.1857%1.0278%
GPU722610.179865.5738%70001000000.00081.3027%0.180666.0222%0.4485%
Difference+6+17.2125+3.0829%+3635200+123356789+0.6932+7.3130%+17.9057+5.3349%+5.3349%

Known prime factors (1 factor, 76.8 bits, 0.00449502% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17084531311225892081779757812492476.79538374655085091008
26 × 32 × 7789 × 8553429847
2019-03-167789855342984712,07631.80259.396

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-01-29T02:01:00Jocelyn LaroucheManual testing5000050000---0.003--0.571%
2011-02-10T06:34:00Carsten Kossendeyleela900001507500---0.011--2.354%
2014-03-31T21:13:00Jocelyn LaroucheManual testing100000100000---0.007--0.883%
2014-04-29T21:12:00Jocelyn LaroucheManual testing150000150000---0.010--1.109%
2014-10-05T22:25:00Jocelyn LaroucheManual testing187569187569---0.013--1.247%
2015-01-07T04:02:00Jocelyn LaroucheManual testing281353281353---0.019--1.524%
2015-02-13T18:00:00Jocelyn LaroucheManual testing374479374479---0.026--1.740%
2015-02-23T15:50:00Jocelyn LaroucheManual testing411926411926---0.028--1.815%
2015-03-05T14:27:00Jocelyn LaroucheManual testing453118453118---0.031--1.893%
2015-03-14T11:30:00Jocelyn LaroucheManual testing498429498429---0.034--1.972%
2015-04-08T16:59:00Jocelyn LaroucheManual testing603098603098---0.041--2.136%
2015-05-01T17:20:00Jocelyn LaroucheManual testing729747729747---0.050--2.307%
2015-05-07T16:18:00Jocelyn LaroucheManual testing802721802721---0.055--2.396%
2015-05-22T00:28:00Jocelyn LaroucheManual testing882993882993---0.060--2.486%
2015-05-26T18:16:00Jocelyn LaroucheManual testing971292971292---0.066--2.578%
2015-06-08T13:43:00Jocelyn LaroucheManual testing10684211068421---0.073--2.672%
2015-06-25T21:14:00Jocelyn LaroucheManual testing11752631175263---0.080--2.768%
2015-07-07T18:13:00Jocelyn LaroucheManual testing12927891292789---0.088--2.866%
2015-07-13T12:24:00Jocelyn LaroucheManual testing14220671422067---0.097--2.965%
2015-07-21T01:20:00Jocelyn LaroucheManual testing15642731564273---0.107--3.066%
2015-07-26T15:28:00mikrMSI3642200123456789---0.694--8.616%
2018-06-18T17:32:45Jocelyn Larouchelow 4M170845317084530012---0.745--8.497%
2018-10-16T21:51:17Jocelyn Larouchelow 4M170845318792983012---0.809--8.611%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-02-02T00:00:00ANONYMOUSv4_computers21258--0.022--
2016-02-23T16:28:47Mark RoseManual testing258260--0.067--
2010-04-23T13:43:00Architects CubedManual testing260261--0.090--
2016-02-23T16:28:47Mark RoseManual testing261262--0.180--
2010-10-16T22:16:00GrunwalderGIMPManual testing21263--0.934--
2016-02-23T16:28:47Mark RoseManual testing262263--0.575--
2015-04-28T04:55:00snme2pm1Manual testing263264--1.149--
2015-04-28T04:55:00snme2pm1Manual testing264265--2.187--
2015-08-31T08:29:00ramgeisManual testing265266--4.374--
2018-06-11T13:42:37TJAOIManual testing266267--8.748--


ECM factoring results:

Old Calculation Method

Total ECM effort:14.927 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:14.927 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000023313.86
500005000000181.070


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-28T00:00:00ANONYMOUSv4_computers50C35A68ECA407B50.080
2015-07-10T01:01:00MadPooManual testing50C35A68ECA407B50.080


PRP results:
dateuseridcompidcofactorsres64PRP
2019-03-16T21:27:45treborLaptop
131122589208177975781249
3BC8814C316572A5no
2019-03-17T12:43:53kkmrkkblmbrbkc5.large
131122589208177975781249
3BC8814C316572A5no


P-1 factor-bounds graph:
B1 = 1708453, B2 = 187929830 (P-1 stage 2)
B1 = 1708453, B2 = 170845300 (P-1 stage 2)
B1 = 3642200, B2 = 123456789 (P-1 stage 2)
B1 = 3642200 (P-1 stage 1)
B1 = 1708453 (P-1 stage 1)
B1 = 1564273 (P-1 stage 1)
B1 = 1422067 (P-1 stage 1)
B1 = 1292789 (P-1 stage 1)
B1 = 1175263 (P-1 stage 1)
B1 = 1068421 (P-1 stage 1)
B1 = 971292 (P-1 stage 1)
B1 = 882993 (P-1 stage 1)
B1 = 802721 (P-1 stage 1)
B1 = 729747 (P-1 stage 1)
B1 = 603098 (P-1 stage 1)
B1 = 498429 (P-1 stage 1)
B1 = 453118 (P-1 stage 1)
B1 = 411926 (P-1 stage 1)
B1 = 374479 (P-1 stage 1)
B1 = 281353 (P-1 stage 1)
B1 = 187569 (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: 2020-04-06T09:21:20+00:00