Solving the pla85900 TSP

Details of this run can be found in the log file recording the output of the Concorde code.

Date	# Nodes	Search Tree	Gap	CPU Days
07.12.2004	155	tree1	0.0209%	269.5
14.03.2005	317	tree2	0.0178%	187.8
02.05.2005	7,359	tree3	0.0150%	3539.0
01.07.2005	6,415	tree4	0.0060%	5160.6
06.07.2005	27	tree5	0.0073%	750.9
14.07.2005	1,913	tree6	0.0054%	1499.1
16.09.2005	14,797	tree7	0.0036%	7702.7
20.08.2005	659	tree8	0.0049%	347.1
06.09.2005	257	tree9	0.0044%	527.2
02.10.2005	5,939	tree10	0.0030%	1996.0
12.11.2005	1,807	tree11	0.0027%	4305.7
09.11.2005	361	tree12	0.0022%	1181.6
24.11.2005	569	tree13	0.0016%	1961.1
06.12.2005	317	tree14	0.0019%	1396.1
14.12.2005	181	tree15	0.0016%	1317.0
06.03.2006	16,267	tree16	0.0007%	7748.9
27.03.2006	9,253	tree17	0.0000%	3698.0
13.04.2006	1,239	tree18	Optimal	2719.5
16.04.2006	275	tree19	Optimal	512.9
20.04.2006	243	tree20	Optimal	286.2