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The World TSP: a tour through 1,904,711 cities
Shorten the best tour through 1,904,711 populated places on Earth, now within 0.0471% of optimal, or raise the lower bound set in 2007.
Issues
Questions, sub-problems and requests for help. Break big problems into sub-issues; start a route from any of them.
No closed issues
Issues hold questions, sub-problems and requests for help.