is 2 1732831 - 1
has 521635 decimal digits
takes 0.094 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 L-L tests remaining
ResidueStatus
L-LF53B98E4C8D80CDAdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26834.397469.1176%18904401906114100.95758.0363%35.354971.5994%2.4818%
PrimeNet2570.011163.1579%80001400000.00122.7972%0.012364.1885%1.0306%
GPU722610.177365.5738%70001100000.00101.3458%0.178366.0371%0.4633%
Difference+7+34.2201+3.5439%+1883440+190501410+0.9565+6.6905%+35.1767+5.5624%+5.5624%

Known prime factors (1 factor, 117.5 bits, 0.00678339% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
173283124236939147571883366047089288289196936117.54569934515101506965670763880864
25 × 3 × 7 × 19 × 83 × 227 × 9472015601 × 30691798603
2020-01-219472015601306917986039.497e+10836.041,516.4

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-07T12:38:00Carsten Kossendeyleela950001543750---0.014--2.124%
2014-04-04T00:13:00Jocelyn LaroucheManual testing100000100000---0.008--0.768%
2014-05-06T10:52:00Jocelyn LaroucheManual testing137040137040---0.011--0.923%
2014-09-10T00:51:00Jocelyn LaroucheManual testing174080174080---0.014--1.053%
2014-12-02T21:55:00Jocelyn LaroucheManual testing211120211120---0.017--1.166%
2015-01-27T21:58:00Jocelyn LaroucheManual testing255455255455---0.020--1.284%
2015-01-29T22:02:00Jocelyn LaroucheManual testing281000281000---0.022--1.346%
2015-02-11T12:22:00Jocelyn LaroucheManual testing374018374018---0.029--1.543%
2015-02-22T09:50:00Jocelyn LaroucheManual testing411419411419---0.032--1.612%
2015-03-08T04:50:00Jocelyn LaroucheManual testing452560452560---0.036--1.683%
2015-03-15T18:55:00Jocelyn LaroucheManual testing497816497816---0.039--1.756%
2015-04-08T16:59:00Jocelyn LaroucheManual testing602356602356---0.047--1.906%
2015-05-01T17:20:00Jocelyn LaroucheManual testing728850728850---0.057--2.064%
2015-05-07T16:19:00Jocelyn LaroucheManual testing801735801735---0.063--2.146%
2015-05-22T00:28:00Jocelyn LaroucheManual testing881908881908---0.069--2.229%
2015-05-26T18:17:00Jocelyn LaroucheManual testing970098970098---0.076--2.314%
2015-06-08T13:43:00Jocelyn LaroucheManual testing10671071067107---0.084--2.401%
2015-06-25T21:15:00Jocelyn LaroucheManual testing11738171173817---0.092--2.490%
2015-07-07T18:13:00Jocelyn LaroucheManual testing12911981291198---0.102--2.581%
2015-07-21T01:20:00Jocelyn LaroucheManual testing14203171420317---0.112--2.673%
2015-07-27T01:26:00Jocelyn LaroucheManual testing15623481562348---0.123--2.767%
2015-09-16T07:26:00Jocelyn LaroucheManual testing17185821718582---0.135--2.863%
2015-09-21T19:55:00mikrMSI3642200123456789---0.800--7.966%
2018-10-03T11:47:41Jocelyn Larouche low 4MManual testing18904401732831012---0.215--5.352%
2018-10-11T10:50:40Jocelyn Larouche low 4MManual testing189044017328310012---0.883--7.928%
2018-10-17T22:59:54Jocelyn Larouche low 4MManual testing189044019061141012---0.958--8.036%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-21T00:00:00ANONYMOUSv4_computers?257--0.011--
2003-02-02T00:00:00ANONYMOUSv4_computers?258--0.022--
2016-02-23T16:28:49Mark RoseManual testing258260--0.066--
2010-04-24T12:42:00For Researchm1_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--
2015-05-05T01:58:00snme2pm1Manual testing263264--1.133--
2015-05-05T01:58:00snme2pm1Manual testing264265--2.156--
2015-09-03T11:06:00ramgeisManual testing265266--4.312--
2018-05-28T14:40:35TJAOIManual testing266267--8.625--
2019-08-06T10:06:02TJAOIManual testing267268--17.25--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.233 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:17.233 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024817.03
50000500000030.206


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-21T00:00:00ANONYMOUSv4_computersF53B98E4C8D80CDA0.094
2015-06-28T05:06:00MadPooManual testingF53B98E4C8D80CDA0.094


PRP results:
dateuseridcompidcofactorsres64PRP
2020-01-21T23:50:45Niels_Mache_NextcloudSuperDry-X
242369391475718833660470892882891969
A7761137104F70D0no
2020-01-30T20:08:11krackerGRID-11
242369391475718833660470892882891969
A7761137104F70D0no


P-1 factor-bounds graph:
B1 = 1890440, B2 = 190611410 (P-1 stage 2)
B1 = 1890440, B2 = 173283100 (P-1 stage 2)
B1 = 3642200, B2 = 123456789 (P-1 stage 2)
B1 = 3642200 (P-1 stage 1)
B1 = 1890440, B2 = 17328310 (P-1 stage 2)
B1 = 1890440 (P-1 stage 1)
B1 = 1718582 (P-1 stage 1)
B1 = 1562348 (P-1 stage 1)
B1 = 1420317 (P-1 stage 1)
B1 = 1291198 (P-1 stage 1)
B1 = 1173817 (P-1 stage 1)
B1 = 1067107 (P-1 stage 1)
B1 = 970098 (P-1 stage 1)
B1 = 881908 (P-1 stage 1)
B1 = 801735 (P-1 stage 1)
B1 = 728850 (P-1 stage 1)
B1 = 602356 (P-1 stage 1)
B1 = 497816 (P-1 stage 1)
B1 = 452560 (P-1 stage 1)
B1 = 411419 (P-1 stage 1)
B1 = 374018 (P-1 stage 1)
B1 = 281000 (P-1 stage 1)
B1 = 255455 (P-1 stage 1)
B1 = 211120 (P-1 stage 1)
B1 = 174080 (P-1 stage 1)
B1 = 95000, B2 = 1543750 (P-1 stage 2)
B1 = 137040 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
103
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106
107
108
109
1010
103
104
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109
1010
1011
TF factor-bounds graph:
268
267
266
265
264
263
262
261
260
258
257
250
260
270
280
290
2100
2110
2120
Last modified: 2020-05-25T09:38:33+00:00