is 2 1732271 - 1
has 521466 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-L48F4C102779CB83Bdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26717.153268.6567%36422001234567890.80008.6271%17.953271.3607%2.7040%
PrimeNet2570.011163.1579%80001400000.00122.7971%0.012364.1884%1.0305%
GPU722610.177365.5738%70001100000.00101.3457%0.178366.0370%0.4633%
Difference+6+16.9758+3.0829%+3635200+123346789+0.7990+7.2814%+17.7748+5.3237%+5.3237%

Known prime factors (1 factor, 78.1 bits, 0.00450792% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17322713215415792287693520672892478.08992809259991297364
22 × 37 × 627089594535793
2018-02-063762708959453579361,0712,687,5495,019,594

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-07T12:40:00Carsten Kossendeyleela950001543750---0.014--2.398%
2014-04-04T00:13:00Jocelyn LaroucheManual testing100000100000---0.008--0.886%
2014-05-06T10:52:00Jocelyn LaroucheManual testing137052137052---0.011--1.059%
2014-09-10T00:51:00Jocelyn LaroucheManual testing174104174104---0.014--1.203%
2014-12-02T21:55:00Jocelyn LaroucheManual testing211156211156---0.017--1.328%
2015-01-27T21:58:00Jocelyn LaroucheManual testing255498255498---0.020--1.459%
2015-01-29T22:02:00Jocelyn LaroucheManual testing281047281047---0.022--1.527%
2015-02-11T12:22:00Jocelyn LaroucheManual testing374093374093---0.029--1.743%
2015-02-22T09:50:00Jocelyn LaroucheManual testing411502411502---0.032--1.818%
2015-03-08T04:50:00Jocelyn LaroucheManual testing452652452652---0.036--1.896%
2015-03-15T18:55:00Jocelyn LaroucheManual testing497917497917---0.039--1.975%
2015-04-08T16:59:00Jocelyn LaroucheManual testing602478602478---0.047--2.139%
2015-05-01T17:20:00Jocelyn LaroucheManual testing728997728997---0.057--2.311%
2015-05-07T16:19:00Jocelyn LaroucheManual testing801896801896---0.063--2.400%
2015-05-22T00:28:00Jocelyn LaroucheManual testing882085882085---0.069--2.490%
2015-05-26T18:17:00Jocelyn LaroucheManual testing970293970293---0.076--2.582%
2015-06-08T13:43:00Jocelyn LaroucheManual testing10673221067322---0.084--2.676%
2015-06-25T21:15:00Jocelyn LaroucheManual testing11740541174054---0.092--2.772%
2015-07-07T18:13:00Jocelyn LaroucheManual testing12914591291459---0.102--2.870%
2015-07-21T01:20:00Jocelyn LaroucheManual testing14206041420604---0.112--2.970%
2015-07-27T01:26:00Jocelyn LaroucheManual testing15626641562664---0.123--3.071%
2015-09-15T15:52:00Jocelyn LaroucheManual testing17189301718930---0.135--3.174%
2015-09-19T15:11:00mikrMSI3642200123456789---0.800--8.627%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-21T00:00:00ANONYMOUSv4_computers21257--0.011--
1999-02-07T00:00:00ANONYMOUSv4_computers21257--0.011--
1999-02-21T00:00:00ANONYMOUSv4_computers21257--0.011--
2003-02-02T00:00:00ANONYMOUSv4_computers21258--0.022--
2016-02-23T16:28:49Mark RoseManual testing258260--0.066--
2010-04-23T13:38:00Architects Cubedm1_f2260261--0.089--
2016-02-23T16:28:49Mark RoseManual testing261262--0.177--
2010-11-18T02:51:00GrunwalderGIMPManual testing21263--0.921--
2016-02-23T16:28:49Mark RoseManual testing262263--0.567--
2015-05-04T21:05:00snme2pm1Manual testing263264--1.133--
2015-05-04T21:05:00snme2pm1Manual testing264265--2.157--
2015-09-03T11:06:00ramgeisManual testing265266--4.314--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.232 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:17.232 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024917.10
50000500000020.137


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-21T00:00:00ANONYMOUSv4_computers48F4C102779CB83B0.094
1999-02-07T00:00:00ANONYMOUSv4_computers48F4C102779CB83B0.094
1999-02-21T00:00:00ANONYMOUSv4_computers48F4C102779CB83B0.094
2015-07-10T01:00:00MadPooManual testing48F4C102779CB83B0.094


PRP results:
dateuseridcompidcofactorsres64PRP
2018-02-09T14:15:52Oliver KruseGTX-7
321541579228769352067289
2622667E4EB2A8__no
2018-02-10T04:14:03kkmrkkblmbrbkc5.large
321541579228769352067289
2622667E4EB2A8__no


P-1 factor-bounds graph:
B1 = 3642200, B2 = 123456789 (P-1 stage 2)
B1 = 3642200 (P-1 stage 1)
B1 = 1718930 (P-1 stage 1)
B1 = 1562664 (P-1 stage 1)
B1 = 1420604 (P-1 stage 1)
B1 = 1291459 (P-1 stage 1)
B1 = 1174054 (P-1 stage 1)
B1 = 1067322 (P-1 stage 1)
B1 = 970293 (P-1 stage 1)
B1 = 882085 (P-1 stage 1)
B1 = 801896 (P-1 stage 1)
B1 = 728997 (P-1 stage 1)
B1 = 602478 (P-1 stage 1)
B1 = 497917 (P-1 stage 1)
B1 = 452652 (P-1 stage 1)
B1 = 411502 (P-1 stage 1)
B1 = 374093 (P-1 stage 1)
B1 = 281047 (P-1 stage 1)
B1 = 255498 (P-1 stage 1)
B1 = 211156 (P-1 stage 1)
B1 = 174104 (P-1 stage 1)
B1 = 95000, B2 = 1543750 (P-1 stage 2)
B1 = 137052 (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: 2020-05-25T09:38:33+00:00