Toriodal Instances in 10**7 by 10**7 Square
Sample Size = 1,000,000
OPT - optimal tour length

   10  0.711713
   20  0.713900
   30  0.713651
   40  0.713424
   50  0.713214
   60  0.713143
   70  0.713027
   80  0.712965
   90  0.712914
  100  0.712872
  200  0.712633
  300  0.712562
  400  0.712532
  500  0.712509
  600  0.712482
  700  0.712470
  800  0.712462
  900  0.712453
 1000  0.712448