is 2 1429063 - 1
has 430191 decimal digits
takes 0.055 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LD5B91A8FA17CB34Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.792668.6567%2500000625000000.31947.3958%21.112070.9748%2.3181%
PrimeNet2560.006762.5000%65001100000.00072.7732%0.007463.5400%1.0400%
GPU722600.107565.0000%6000800000.00061.3035%0.108065.4562%0.4562%
Difference+7+20.6851+3.6567%+2494000+62420000+0.3188+6.0924%+21.0039+5.5186%+5.5186%

Known prime factors (1 factor, 78.0 bits, 0.00545514% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14290632934344979831611275315512477.957102666746666578425
3 × 52 × 311 × 4401575419789
2017-02-10311440157541978930,80613,27624,796

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers15000243750---0.002--0.836%
2009-08-05T17:11:00markrlounge2000005000000---0.026--3.478%
2014-11-10T23:29:00Jocelyn LaroucheManual testing244913244913---0.014--1.385%
2015-01-30T21:42:00Jocelyn LaroucheManual testing404105404105---0.022--1.751%
2015-02-20T16:56:00Jocelyn LaroucheManual testing444515444515---0.025--1.827%
2015-03-01T03:15:00Jocelyn LaroucheManual testing488966488966---0.027--1.904%
2015-03-05T14:27:00Jocelyn LaroucheManual testing537862537862---0.030--1.983%
2015-03-12T10:39:00Jocelyn LaroucheManual testing591648591648---0.033--2.064%
2015-03-24T11:42:00alpertronManual testing200000060000000---0.286--7.218%
2016-08-18T05:21:09Bruno Victal5820K-factoring25000006250000012---0.319--7.396%
2016-08-27T10:53:43Bruno VictalManual testing25000006250000012---0.319--7.396%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-10-20T00:00:00ANONYMOUSv4_computers21257--0.013--
2016-02-23T16:28:31Mark RoseManual testing257260--0.094--
2009-02-16T21:26:00Sturle Sundegobi.ifi260261--0.107--
2016-02-23T16:28:31Mark RoseManual testing261262--0.215--
2011-05-07T23:53:00GrunwalderGIMPManual testing21263--1.117--
2016-02-23T16:28:31Mark RoseManual testing262263--0.687--
2015-03-20T00:55:00snme2pm1Manual testing263264--1.374--
2015-03-20T00:55:00snme2pm1Manual testing264265--2.615--
2015-10-11T16:52:53ramgeisManual testing265266--5.229--


ECM factoring results:

Old Calculation Method

Total ECM effort:25.462 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000301 / 1003.0104.855%
2550000301 / 2801.07534.064%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:25.462 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100012.2630.000%
25500001.35725.749%
302500000.11389.315%
3510000000.00899.236%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025011.80
50000500000010.047
250000350000005013.61


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-11-13T16:44:23MadPooManual testingD5B91A8FA17CB34D0.055


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T21:35:23Oliver KruseGTX-2
293434497983161127531551
08E66405A1DA81__no
2017-10-26T21:07:12kkmrkkblmbrbkold
293434497983161127531551
08E66405A1DA81__no


P-1 factor-bounds graph:
B1 = 2500000, B2 = 62500000 (P-1 stage 2)
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2500000 (P-1 stage 1)
B1 = 2000000 (P-1 stage 1)
B1 = 591648 (P-1 stage 1)
B1 = 537862 (P-1 stage 1)
B1 = 488966 (P-1 stage 1)
B1 = 200000, B2 = 5000000 (P-1 stage 2)
B1 = 444515 (P-1 stage 1)
B1 = 404105 (P-1 stage 1)
B1 = 244913 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
B1 = 15000, B2 = 243750 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-10-20T13:16:42+00:00