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FNC19402 - Computation Log
Instance Created: April 26, 2002
Number of Cities: 19402
Status: OPEN
Best Tour: 59287
Best Lower Bound: 59275
History
Date |
Gap |
Lower Bound |
Tour |
10.6.02 |
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59303 - Best of 10 runs of LKH, each with n trials. Total running time 330209 seconds on an AMD Althlon 1900+ processor (1.6 GHz). |
2.2.03 |
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59295 - Found by Keld Helsgaun,
using a variant of LKH. |
3.3.03 |
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59291 - Found by Hung
Dinh Nguyen using
a parallel hybrid genetic algorithm.
The running time was 75273 seconds on a Sun Ultra 80 with four 450-MHz
processors (taking the best of five runs). |
16.3.03 |
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59289 - Found by Hung
Dinh Nguyen using a hybrid genetic algorithm, starting with the
above tour (10455 seconds). |
18.3.03 |
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59288 - Found by Keld Helsgaun,
using a variant of LKH. |
1.4.08 |
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59287
Found by Changxing Dong, Gerold Jaeger, Paul Molitor, Dirk Richter
by a variant of LKH based an backbone contraction. The running time was
25320 seconds on an AMD Opteron (2.6 GHz).
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3.5.17 |
0.020% |
59275 - Concorde (-Z1 -J4), using CPLEX as an LP solver. Wall-clock time for the branch-and-cut search was 2.6 days on a 48-core Intel Xeon E5-2620 @ 2.00GHz cluster; search tree contained 1,621 nodes. |
Notes
1. Concorde is our linear-programming based TSP solver.
2. linkern is an implementation of Martin, Otto, and Felten's Chained Lin-Kernighan heuristic. It is included in the Concorde code.
3. LKH is Keld Helsgaun's powerful implementation of the Lin-Kernighan heuristic.
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Last Updated: May 3, 2017
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