is 2 1714891 - 1
has 516234 decimal digits
takes 0.081 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LDE074ED317134D88double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26717.327068.6567%36422001234567890.69408.6188%18.021071.3581%2.7014%
PrimeNet2570.011263.1579%80001400000.00102.7917%0.012264.1864%1.0285%
GPU722610.179165.5738%70001100000.00091.3428%0.180066.0361%0.4623%
Difference+6+17.1479+3.0829%+3635200+123346789+0.6931+7.2760%+17.8410+5.3221%+5.3221%

Known prime factors (1 factor, 77.1 bits, 0.00449435% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17148911589783572292064880482792477.07346352321293075329
3 × 7 × 2207253394908349
2019-05-097220725339490834920,2018,206,43015,327,326

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-01-29T18:46:00Jocelyn LaroucheManual testing5000050000---0.003--0.572%
2011-02-10T06:35:00Carsten Kossendeyleela900001507500---0.011--2.355%
2014-04-01T22:35:00Jocelyn LaroucheManual testing100000100000---0.007--0.884%
2014-05-03T00:50:00Jocelyn LaroucheManual testing150000150000---0.010--1.110%
2014-10-05T22:25:00Jocelyn LaroucheManual testing187428187428---0.013--1.248%
2015-01-09T22:25:00Jocelyn LaroucheManual testing281142281142---0.019--1.525%
2015-02-03T07:46:00Jocelyn LaroucheManual testing309256309256---0.021--1.595%
2015-02-16T20:56:00Jocelyn LaroucheManual testing340181340181---0.023--1.666%
2015-02-21T13:42:00Jocelyn LaroucheManual testing374199374199---0.026--1.740%
2015-03-01T03:15:00Jocelyn LaroucheManual testing411618411618---0.028--1.816%
2015-03-05T14:27:00Jocelyn LaroucheManual testing452779452779---0.031--1.893%
2015-03-14T11:30:00Jocelyn LaroucheManual testing498056498056---0.034--1.972%
2015-04-08T16:59:00Jocelyn LaroucheManual testing602647602647---0.041--2.136%
2015-05-01T17:20:00Jocelyn LaroucheManual testing729202729202---0.050--2.308%
2015-05-07T16:18:00Jocelyn LaroucheManual testing802122802122---0.055--2.396%
2015-05-22T00:28:00Jocelyn LaroucheManual testing882334882334---0.060--2.487%
2015-05-26T18:16:00Jocelyn LaroucheManual testing970567970567---0.066--2.579%
2015-06-08T13:43:00Jocelyn LaroucheManual testing10676231067623---0.073--2.673%
2015-06-25T21:15:00Jocelyn LaroucheManual testing11743851174385---0.080--2.769%
2015-07-07T18:13:00Jocelyn LaroucheManual testing12918231291823---0.088--2.866%
2015-07-13T12:24:00Jocelyn LaroucheManual testing14210051421005---0.097--2.966%
2015-07-24T22:03:00Jocelyn LaroucheManual testing15631051563105---0.107--3.067%
2015-08-04T15:21:00mikrMSI3642200123456789---0.694--8.619%
2018-04-01T08:25:35Jocelyn Larouchelow 4M171941517194150012---0.750--8.513%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-02-02T00:00:00ANONYMOUSv4_computers21258--0.022--
2016-02-23T16:28:48Mark RoseManual testing258260--0.067--
2010-04-24T12:42:00Architects Cubeda3_bu2260261--0.090--
2016-02-23T16:28:48Mark RoseManual testing261262--0.179--
2010-10-16T22:16:00GrunwalderGIMPManual testing21263--0.931--
2016-02-23T16:28:48Mark RoseManual testing262263--0.572--
2015-04-29T06:30:00snme2pm1Manual testing263264--1.145--
2015-04-29T06:30:00snme2pm1Manual testing264265--2.179--
2015-09-01T08:49:00ramgeisManual testing265266--4.358--
2018-06-04T13:10:09TJAOIManual testing266267--8.715--


ECM factoring results:

Old Calculation Method

Total ECM effort:14.933 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:14.933 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024414.52
50000500000070.416


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-28T00:00:00ANONYMOUSv4_computersDE074ED317134D880.081
2015-07-10T01:00:00MadPooManual testingDE074ED317134D880.081


PRP results:
dateuseridcompidcofactorsres64PRP
2019-05-10T06:48:32Niels_Mache_NextcloudSuperDry3
158978357229206488048279
C0B5A7674250A5E8no
2019-05-10T07:05:10ATHec2-PRPCFDC
158978357229206488048279
C0B5A7674250A5E8no
2019-05-10T22:33:20Daniil Tsarkovtsar1
158978357229206488048279
C0B5A7674250A5E8no


P-1 factor-bounds graph:
B1 = 1719415, B2 = 171941500 (P-1 stage 2)
B1 = 3642200, B2 = 123456789 (P-1 stage 2)
B1 = 3642200 (P-1 stage 1)
B1 = 1719415 (P-1 stage 1)
B1 = 1563105 (P-1 stage 1)
B1 = 1421005 (P-1 stage 1)
B1 = 1291823 (P-1 stage 1)
B1 = 1174385 (P-1 stage 1)
B1 = 1067623 (P-1 stage 1)
B1 = 970567 (P-1 stage 1)
B1 = 882334 (P-1 stage 1)
B1 = 802122 (P-1 stage 1)
B1 = 729202 (P-1 stage 1)
B1 = 602647 (P-1 stage 1)
B1 = 498056 (P-1 stage 1)
B1 = 452779 (P-1 stage 1)
B1 = 411618 (P-1 stage 1)
B1 = 374199 (P-1 stage 1)
B1 = 340181 (P-1 stage 1)
B1 = 309256 (P-1 stage 1)
B1 = 281142 (P-1 stage 1)
B1 = 187428 (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: 2020-04-20T10:38:38+00:00