is 2 1732669 - 1
has 521586 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-LDD2356A994DDCD1Adouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26834.400669.1176%18905591905935900.95758.0361%35.358171.5994%2.4818%
PrimeNet2570.011163.1579%80001400000.00122.7972%0.012364.1884%1.0305%
GPU722610.177365.5738%70001100000.00101.3458%0.178366.0371%0.4633%
Difference+7+34.2233+3.5439%+1883559+190483590+0.9565+6.6904%+35.1798+5.5623%+5.5623%

Known prime factors (1 factor, 80.3 bits, 0.00463345% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
173266914703371149322554308937932580.282424298326723758384
24 × 3 × 17 × 2521 × 206256818569
2020-03-202521206256818569164,082883.971,651.0

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-07T12:40:00Carsten Kossendeyleela950001543750---0.014--2.124%
2014-04-04T00:13:00Jocelyn LaroucheManual testing100000100000---0.008--0.768%
2014-05-06T10:52:00Jocelyn LaroucheManual testing137044137044---0.011--0.923%
2014-09-10T00:51:00Jocelyn LaroucheManual testing174088174088---0.014--1.053%
2014-12-02T21:55:00Jocelyn LaroucheManual testing211132211132---0.017--1.166%
2015-01-27T21:58:00Jocelyn LaroucheManual testing255469255469---0.020--1.284%
2015-01-29T22:02:00Jocelyn LaroucheManual testing281015281015---0.022--1.346%
2015-02-11T12:22:00Jocelyn LaroucheManual testing374040374040---0.029--1.543%
2015-02-22T09:50:00Jocelyn LaroucheManual testing411444411444---0.032--1.612%
2015-03-08T04:50:00Jocelyn LaroucheManual testing452588452588---0.036--1.683%
2015-03-15T18:55:00Jocelyn LaroucheManual testing497846497846---0.039--1.756%
2015-04-08T16:59:00Jocelyn LaroucheManual testing602393602393---0.047--1.906%
2015-05-01T17:20:00Jocelyn LaroucheManual testing728895728895---0.057--2.064%
2015-05-07T16:19:00Jocelyn LaroucheManual testing801784801784---0.063--2.146%
2015-05-22T00:28:00Jocelyn LaroucheManual testing881962881962---0.069--2.229%
2015-05-26T18:17:00Jocelyn LaroucheManual testing970158970158---0.076--2.314%
2015-06-08T13:43:00Jocelyn LaroucheManual testing10671731067173---0.084--2.401%
2015-06-25T21:15:00Jocelyn LaroucheManual testing11738901173890---0.092--2.490%
2015-07-07T18:13:00Jocelyn LaroucheManual testing12912791291279---0.102--2.581%
2015-07-21T01:20:00Jocelyn LaroucheManual testing14204061420406---0.112--2.673%
2015-07-27T01:26:00Jocelyn LaroucheManual testing15624461562446---0.123--2.767%
2015-09-16T07:26:00Jocelyn LaroucheManual testing17186901718690---0.135--2.863%
2015-09-21T00:50:00mikrMSI3642200123456789---0.800--7.966%
2018-10-03T11:47:41Jocelyn Larouchelow 4M18905591732669012---0.215--5.352%
2018-10-11T10:50:40Jocelyn Larouchelow 4M189055917326690012---0.883--7.928%
2018-10-17T22:59:54Jocelyn Larouchelow 4M189055919059359012---0.957--8.036%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-21T00:00:00ANONYMOUSv4_computers21257--0.011--
2003-02-02T00:00:00ANONYMOUSv4_computers21258--0.022--
2016-02-23T16:28:49Mark RoseManual testing258260--0.066--
2010-04-24T12:42:00Architects 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--
2015-05-05T00:55:00snme2pm1Manual testing263264--1.133--
2015-05-05T00:55:00snme2pm1Manual testing264265--2.156--
2015-09-03T11:06:00ramgeisManual testing265266--4.313--
2018-05-28T14:40:35TJAOIManual testing266267--8.626--
2019-08-06T10:06:02TJAOIManual testing267268--17.25--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.439 GHz-days
Estimated T-Level:24.536
DigitsB1CurvesCompleteFacMiss
2011000254 / 1002.5407.786%
2550000254 / 2800.90740.302%

New Calculation Method

Total ECM effort:17.439 GHz-days
Estimated T-Level:24.536
DigitsB1CompleteFacMiss
20110008.1940.028%
25500000.74147.686%
302500000.04695.542%
3510000000.00299.791%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025117.23
50000500000030.206


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-13T00:00:00ANONYMOUSv4_computersDD2356A994DDCD1A0.094
2015-07-18T19:04:00MadPooManual testingDD2356A994DDCD1A0.094


PRP results:
dateuseridcompidcofactorsres64PRP
2020-03-20T18:28:27mnd9consult
1470337114932255430893793
85BB77C6F4E89411no
2020-03-20T22:50:13Gabriel Lignelli6300
1470337114932255430893793
85BB77C6F4E89411no
2020-03-21T07:38:02Niels_Mache_NextcloudSuperDry-X
1470337114932255430893793
85BB77C6F4E89411no


P-1 factor-bounds graph:
B1 = 1890559, B2 = 190593590 (P-1 stage 2)
B1 = 1890559, B2 = 173266900 (P-1 stage 2)
B1 = 3642200, B2 = 123456789 (P-1 stage 2)
B1 = 3642200 (P-1 stage 1)
B1 = 1890559, B2 = 17326690 (P-1 stage 2)
B1 = 1890559 (P-1 stage 1)
B1 = 1718690 (P-1 stage 1)
B1 = 1562446 (P-1 stage 1)
B1 = 1420406 (P-1 stage 1)
B1 = 1291279 (P-1 stage 1)
B1 = 1173890 (P-1 stage 1)
B1 = 1067173 (P-1 stage 1)
B1 = 970158 (P-1 stage 1)
B1 = 881962 (P-1 stage 1)
B1 = 801784 (P-1 stage 1)
B1 = 728895 (P-1 stage 1)
B1 = 602393 (P-1 stage 1)
B1 = 497846 (P-1 stage 1)
B1 = 452588 (P-1 stage 1)
B1 = 411444 (P-1 stage 1)
B1 = 374040 (P-1 stage 1)
B1 = 281015 (P-1 stage 1)
B1 = 255469 (P-1 stage 1)
B1 = 211132 (P-1 stage 1)
B1 = 174088 (P-1 stage 1)
B1 = 95000, B2 = 1543750 (P-1 stage 2)
B1 = 137044 (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: 2020-05-18T10:37:36+00:00