is 2 1733177 - 1
has 521739 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-L5574D782840FE18Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26834.390569.1176%18902021906494700.95778.0366%35.348271.5995%2.4819%
PrimeNet2570.011163.1579%80001400000.00122.7973%0.012364.1885%1.0306%
GPU722610.177265.5738%70001100000.00101.3459%0.178266.0371%0.4633%
Difference+7+34.2133+3.5439%+1883202+190539470+0.9567+6.6907%+35.1700+5.5624%+5.5624%

Known prime factors (1 factor, 70.6 bits, 0.00407248% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
173317717689134353236866933592270.583510309516951727
23 × 353 × 62853740233
2020-02-2035362853740233249.17269.38503.12

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-10T06:34:00Carsten Kossendeyleela950001543750---0.014--2.124%
2014-04-04T00:13:00Jocelyn LaroucheManual testing100000100000---0.008--0.768%
2014-05-06T10:52:00Jocelyn LaroucheManual testing137033137033---0.011--0.923%
2014-09-10T00:51:00Jocelyn LaroucheManual testing174066174066---0.014--1.053%
2014-12-02T21:55:00Jocelyn LaroucheManual testing211099211099---0.017--1.166%
2015-01-27T21:58:00Jocelyn LaroucheManual testing255428255428---0.020--1.284%
2015-01-29T22:02:00Jocelyn LaroucheManual testing280970280970---0.022--1.346%
2015-02-11T12:22:00Jocelyn LaroucheManual testing373970373970---0.029--1.543%
2015-02-22T09:50:00Jocelyn LaroucheManual testing411367411367---0.032--1.612%
2015-03-08T04:50:00Jocelyn LaroucheManual testing452503452503---0.036--1.683%
2015-03-15T18:55:00Jocelyn LaroucheManual testing497753497753---0.039--1.755%
2015-04-08T16:59:00Jocelyn LaroucheManual testing602280602280---0.047--1.906%
2015-05-01T17:20:00Jocelyn LaroucheManual testing728758728758---0.057--2.064%
2015-05-07T16:19:00Jocelyn LaroucheManual testing801633801633---0.063--2.146%
2015-05-22T00:28:00Jocelyn LaroucheManual testing881796881796---0.069--2.229%
2015-05-26T18:17:00Jocelyn LaroucheManual testing969975969975---0.076--2.314%
2015-06-08T13:43:00Jocelyn LaroucheManual testing10669721066972---0.084--2.401%
2015-06-25T21:15:00Jocelyn LaroucheManual testing11736691173669---0.092--2.490%
2015-07-07T18:13:00Jocelyn LaroucheManual testing12910351291035---0.102--2.580%
2015-07-21T01:20:00Jocelyn LaroucheManual testing14201381420138---0.112--2.673%
2015-07-27T01:26:00Jocelyn LaroucheManual testing15621511562151---0.123--2.767%
2015-09-16T07:26:00Jocelyn LaroucheManual testing17183661718366---0.135--2.862%
2015-09-23T04:57:35mikrMSI3642200123456789---0.800--7.967%
2018-10-03T11:47:41Jocelyn Larouchelow 4M18902021733177012---0.215--5.352%
2018-10-11T10:50:40Jocelyn Larouchelow 4M189020217331770012---0.883--7.928%
2018-10-17T22:59:54Jocelyn Larouchelow 4M189020219064947012---0.958--8.037%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
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--0.566--
2015-05-05T02:52:00snme2pm1Manual testing263264--1.133--
2015-05-05T02:52:00snme2pm1Manual testing264265--2.156--
2015-09-03T11:06:00ramgeisManual testing265266--4.312--
2018-05-28T14:40:35TJAOIManual testing266267--8.623--
2019-06-24T09:36:09TJAOIManual 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
50000500000024917.10
50000500000020.137


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-10T00:00:00ANONYMOUSv4_computers5574D782840FE18C0.094
2015-07-18T19:04:00MadPooManual testing5574D782840FE18C0.094


PRP results:
dateuseridcompidcofactorsres64PRP
2020-02-21T07:29:41Niels_Mache_NextcloudSuperDry-X
1768913435323686693359
A452ECD94A64487Dno
2020-02-21T10:02:03Jinyuan WangManual testing
1768913435323686693359
A452ECD94A64487Dno
2020-02-23T15:43:26arnaudstm-11-010
1768913435323686693359
A452ECD94A64487Dno


P-1 factor-bounds graph:
B1 = 1890202, B2 = 190649470 (P-1 stage 2)
B1 = 1890202, B2 = 173317700 (P-1 stage 2)
B1 = 3642200, B2 = 123456789 (P-1 stage 2)
B1 = 3642200 (P-1 stage 1)
B1 = 1890202, B2 = 17331770 (P-1 stage 2)
B1 = 1890202 (P-1 stage 1)
B1 = 1718366 (P-1 stage 1)
B1 = 1562151 (P-1 stage 1)
B1 = 1420138 (P-1 stage 1)
B1 = 1291035 (P-1 stage 1)
B1 = 1173669 (P-1 stage 1)
B1 = 1066972 (P-1 stage 1)
B1 = 969975 (P-1 stage 1)
B1 = 881796 (P-1 stage 1)
B1 = 801633 (P-1 stage 1)
B1 = 728758 (P-1 stage 1)
B1 = 602280 (P-1 stage 1)
B1 = 497753 (P-1 stage 1)
B1 = 452503 (P-1 stage 1)
B1 = 411367 (P-1 stage 1)
B1 = 373970 (P-1 stage 1)
B1 = 280970 (P-1 stage 1)
B1 = 255428 (P-1 stage 1)
B1 = 211099 (P-1 stage 1)
B1 = 174066 (P-1 stage 1)
B1 = 95000, B2 = 1543750 (P-1 stage 2)
B1 = 137033 (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: 2020-10-16T08:07:38+00:00