is 2 1727573 - 1
has 520052 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-LADE67FD21B487330double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26834.502169.1176%36422001234567890.80007.9641%35.302171.5771%2.4595%
PrimeNet2570.011163.1579%80001400000.00122.7956%0.012364.1879%1.0300%
GPU722610.177865.5738%70001100000.00101.3449%0.178866.0368%0.4630%
Difference+7+34.3243+3.5439%+3635200+123346789+0.7990+6.6191%+35.1233+5.5404%+5.5404%

Known prime factors (1 factor, 86.9 bits, 0.00503291% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17275731491739603747025877506532472786.94743174430364072194851
2351 × 18364283438567501
2020-02-1623511836428343856750118,085,81878,704,728146,998,514

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-07T12:47:00Carsten Kossendeyleela900001530000---0.013--2.095%
2014-04-04T00:13:00Jocelyn LaroucheManual testing100000100000---0.008--0.768%
2014-05-04T19:08:00Jocelyn LaroucheManual testing137153137153---0.011--0.923%
2014-09-10T00:51:00Jocelyn LaroucheManual testing174306174306---0.014--1.053%
2014-12-02T21:55:00Jocelyn LaroucheManual testing211459211459---0.017--1.166%
2015-01-29T22:02:00Jocelyn LaroucheManual testing281450281450---0.022--1.347%
2015-02-04T23:01:00Jocelyn LaroucheManual testing562900562900---0.044--1.851%
2015-03-29T20:50:00Jocelyn LaroucheManual testing619190619190---0.049--1.928%
2015-04-08T16:59:00Jocelyn LaroucheManual testing681109681109---0.054--2.006%
2015-05-01T17:21:00Jocelyn LaroucheManual testing824140824140---0.065--2.169%
2015-05-22T00:28:00Jocelyn LaroucheManual testing906554906554---0.071--2.253%
2015-05-26T18:17:00Jocelyn LaroucheManual testing997209997209---0.078--2.338%
2015-06-08T13:43:00Jocelyn LaroucheManual testing10969291096929---0.086--2.426%
2015-06-25T21:15:00Jocelyn LaroucheManual testing12066211206621---0.095--2.515%
2015-07-07T18:13:00Jocelyn LaroucheManual testing13272831327283---0.104--2.606%
2015-07-21T01:20:00Jocelyn LaroucheManual testing14600111460011---0.115--2.699%
2015-07-28T19:04:00Jocelyn LaroucheManual testing16060121606012---0.126--2.793%
2015-09-07T12:25:00mikrMSI3642200123456789---0.800--7.964%
2018-10-03T11:47:43Jocelyn Larouchelow 4M17275731727573012---0.203--5.312%
2018-10-07T10:38:14Jocelyn Larouchelow 4M17275736910292012---0.425--6.830%
2018-10-12T11:50:59Jocelyn Larouchelow 4M172757317275730012---0.869--7.853%
2018-10-17T22:59:51Jocelyn Larouchelow 4M172757319003303012---0.943--7.960%


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 Cubedm1_76l260261--0.089--
2016-02-23T16:28:48Mark RoseManual testing261262--0.178--
2010-11-18T02:51:00GrunwalderGIMPManual testing21263--0.924--
2016-02-23T16:28:48Mark RoseManual testing262263--0.568--
2015-05-04T08:45:00snme2pm1Manual testing263264--1.136--
2015-05-04T08:45:00snme2pm1Manual testing264265--2.163--
2015-09-02T13:37:00ramgeisManual testing265266--4.326--
2018-04-02T12:17:08TJAOIManual testing266267--8.651--
2019-06-24T09:36:09TJAOIManual testing267268--17.30--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.227 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:17.227 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024917.09
50000500000020.137


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-30T00:00:00ANONYMOUSv4_computersADE67FD21B4873300.094
2015-07-03T04:32:00MadPooManual testingADE67FD21B4873300.094


PRP results:
dateuseridcompidcofactorsres64PRP
2020-02-17T06:58:02Jinyuan WangManual testing
149173960374702587750653247
30EBC93E16F653B3no
2020-02-23T02:10:36Luigi Morelli9800X
149173960374702587750653247
30EBC93E16F653B3no


P-1 factor-bounds graph:
B1 = 1727573, B2 = 190033030 (P-1 stage 2)
B1 = 1727573, B2 = 172757300 (P-1 stage 2)
B1 = 3642200, B2 = 123456789 (P-1 stage 2)
B1 = 1727573, B2 = 69102920 (P-1 stage 2)
B1 = 3642200 (P-1 stage 1)
B1 = 1727573, B2 = 17275730 (P-1 stage 2)
B1 = 1727573 (P-1 stage 1)
B1 = 1606012 (P-1 stage 1)
B1 = 1460011 (P-1 stage 1)
B1 = 1327283 (P-1 stage 1)
B1 = 1206621 (P-1 stage 1)
B1 = 1096929 (P-1 stage 1)
B1 = 997209 (P-1 stage 1)
B1 = 906554 (P-1 stage 1)
B1 = 824140 (P-1 stage 1)
B1 = 681109 (P-1 stage 1)
B1 = 619190 (P-1 stage 1)
B1 = 562900 (P-1 stage 1)
B1 = 281450 (P-1 stage 1)
B1 = 211459 (P-1 stage 1)
B1 = 174306 (P-1 stage 1)
B1 = 90000, B2 = 1530000 (P-1 stage 2)
B1 = 137153 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 90000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-05-18T10:38:20+00:00