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EI8246 - Ireland Computation Log
Instance Created: July 29, 2001
Number of Cities: 8,246
Optimal Value: 206,171
Solved: March 22, 2009
Solution Method: Concorde
||206,171 - Best
tour from 40 runs of LKH (n trials per run). The 40 LKH runs took a total of 304,886 seconds on a 500 MHz EV6 Alpha. Merging the tours (52.99 seconds)
did not make an improvement.
||206,128 - Established by Concorde with -C 20 (used 1,175 nodes in the branch-and-cut tree, 743,371 seconds on a 500 MHz EV6 Alpha).
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: March 23, 2009.