is 2 1731929 - 1
has 521363 decimal digits
takes 0.094 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L3D9D403C86BD26CDdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26834.415369.1176%18909161905121900.95718.0355%35.372471.5992%2.4815%
PrimeNet2570.011163.1579%80001400000.00122.7970%0.012364.1884%1.0305%
GPU722610.177465.5738%70001100000.00101.3457%0.178466.0370%0.4633%
Difference+7+34.2379+3.5439%+1883916+190402190+0.9561+6.6898%+35.1941+5.5622%+5.5622%

Known prime factors (1 factor, 70.1 bits, 0.00404672% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
173192912534144938135274204712270.086361855045389715
5 × 14717 × 4917510979
2020-05-13147174917510979166.5121.07639.363

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-07T12:44:00Carsten Kossendeyleela950001543750---0.014--2.124%
2014-04-04T00:13:00Jocelyn LaroucheManual testing100000100000---0.008--0.768%
2014-05-06T10:52:00Jocelyn LaroucheManual testing137059137059---0.011--0.923%
2014-09-10T00:51:00Jocelyn LaroucheManual testing174118174118---0.014--1.053%
2014-12-02T21:55:00Jocelyn LaroucheManual testing211177211177---0.017--1.166%
2015-01-27T21:58:00Jocelyn LaroucheManual testing255523255523---0.020--1.284%
2015-01-29T22:02:00Jocelyn LaroucheManual testing281075281075---0.022--1.346%
2015-02-12T12:33:00Jocelyn LaroucheManual testing340100340100---0.027--1.476%
2015-02-20T16:56:00Jocelyn LaroucheManual testing374110374110---0.029--1.543%
2015-02-22T09:50:00Jocelyn LaroucheManual testing411521411521---0.032--1.612%
2015-03-08T04:50:00Jocelyn LaroucheManual testing452673452673---0.036--1.683%
2015-03-15T18:55:00Jocelyn LaroucheManual testing497940497940---0.039--1.756%
2015-04-08T16:59:00Jocelyn LaroucheManual testing602507602507---0.047--1.906%
2015-05-01T17:20:00Jocelyn LaroucheManual testing729032729032---0.057--2.064%
2015-05-07T16:19:00Jocelyn LaroucheManual testing801935801935---0.063--2.146%
2015-05-22T00:28:00Jocelyn LaroucheManual testing882128882128---0.069--2.229%
2015-05-26T18:16:00Jocelyn LaroucheManual testing970340970340---0.076--2.314%
2015-06-08T13:43:00Jocelyn LaroucheManual testing10673741067374---0.084--2.401%
2015-06-25T21:15:00Jocelyn LaroucheManual testing11741111174111---0.092--2.490%
2015-07-07T18:13:00Jocelyn LaroucheManual testing12915221291522---0.102--2.581%
2015-07-21T01:20:00Jocelyn LaroucheManual testing14206741420674---0.112--2.673%
2015-07-27T01:26:00Jocelyn LaroucheManual testing15627411562741---0.123--2.767%
2015-09-15T15:52:00Jocelyn LaroucheManual testing17190151719015---0.135--2.863%
2015-09-18T12:23:00mikrMSI3642200123456789---0.800--7.966%
2018-10-03T11:47:42Jocelyn Larouchelow 4M18909161731929012---0.215--5.351%
2018-10-11T10:50:40Jocelyn Larouchelow 4M189091617319290012---0.883--7.927%
2018-10-17T22:59:53Jocelyn Larouchelow 4M189091619051219012---0.957--8.035%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-01-29T00:00:00ANONYMOUSv4_computers21257--0.011--
2003-02-02T00:00:00ANONYMOUSv4_computers21258--0.022--
2016-02-23T16:28:49Mark RoseManual testing258260--0.067--
2010-04-23T13:38:00Architects Cubedm1_f2260261--0.089--
2016-02-23T16:28:49Mark RoseManual testing261262--0.177--
2010-11-18T02:51:00GrunwalderGIMPManual testing21263--0.922--
2016-02-23T16:28:49Mark RoseManual testing262263--0.567--
2015-05-04T20:01:00snme2pm1Manual testing263264--1.134--
2015-05-04T20:01:00snme2pm1Manual testing264265--2.157--
2015-09-03T11:06:00ramgeisManual testing265266--4.315--
2018-06-04T13:10:09TJAOIManual testing266267--8.629--
2019-08-06T10:06:03TJAOIManual testing267268--17.26--


ECM factoring results:

Old Calculation Method

Total ECM effort:18.468 GHz-days
Estimated T-Level:24.804
DigitsB1CurvesCompleteFacMiss
2011000269 / 1002.6906.697%
2550000269 / 2800.96138.196%

New Calculation Method

Total ECM effort:18.468 GHz-days
Estimated T-Level:24.804
DigitsB1CompleteFacMiss
20110008.6770.017%
25500000.78445.646%
302500000.04895.285%
3510000000.00299.779%


ECM Summary

B1B2factorcurvesGHz-days
50000500000026618.26
50000500000030.206


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-02-07T00:00:00ANONYMOUSv4_computers3D9D403C86BD26CD0.094
2015-07-18T19:04:00MadPooManual testing3D9D403C86BD26CD0.094


PRP results:
dateuseridcompidcofactorsres64PRP
2020-05-13T05:20:44CrypticCluecruncher
1253414493813527420471
438EE82D2E2AB0AFno
2020-05-15T11:24:15arnaudstm-11-010
1253414493813527420471
438EE82D2E2AB0AFno


P-1 factor-bounds graph:
B1 = 1890916, B2 = 190512190 (P-1 stage 2)
B1 = 1890916, B2 = 173192900 (P-1 stage 2)
B1 = 3642200, B2 = 123456789 (P-1 stage 2)
B1 = 3642200 (P-1 stage 1)
B1 = 1890916, B2 = 17319290 (P-1 stage 2)
B1 = 1890916 (P-1 stage 1)
B1 = 1719015 (P-1 stage 1)
B1 = 1562741 (P-1 stage 1)
B1 = 1420674 (P-1 stage 1)
B1 = 1291522 (P-1 stage 1)
B1 = 1174111 (P-1 stage 1)
B1 = 1067374 (P-1 stage 1)
B1 = 970340 (P-1 stage 1)
B1 = 882128 (P-1 stage 1)
B1 = 801935 (P-1 stage 1)
B1 = 729032 (P-1 stage 1)
B1 = 602507 (P-1 stage 1)
B1 = 497940 (P-1 stage 1)
B1 = 452673 (P-1 stage 1)
B1 = 411521 (P-1 stage 1)
B1 = 374110 (P-1 stage 1)
B1 = 340100 (P-1 stage 1)
B1 = 281075 (P-1 stage 1)
B1 = 255523 (P-1 stage 1)
B1 = 211177 (P-1 stage 1)
B1 = 174118 (P-1 stage 1)
B1 = 95000, B2 = 1543750 (P-1 stage 2)
B1 = 137059 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-06-01T14:16:55+00:00