Code details

best found code with parameters
q=17 k=3 n=61
minimum distance = 56

this is new optimal code


the previous bounds were -1/56
this is a projective code


We used the prescribed group of automorphisms with the following generators


0 16 0
16 0 0
0 0 16

0 12 0
12 0 0
0 0 16

This group makes 51 orbits of sizes:

1 2 8 1 4 2 8 2 8 2 8 2 8 2 8 1 4 4 4 4 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 2 8 8 8 8 2 4 4 4 8 8 8


The solution of the corresponding linear system of equations was found after less than 100 seconds:

1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 1 0 0 0 0 1 0 0 1 0 0 0 0 1 0 0 1 0 0 0 0 0 0 1 0 0 1 0 0 1 4 5 0 5 2 5 1 5 3 5 4 2 5 5 5 5 2 2 5 4 0 5 3 5 3 5 5 4 0 5 5 0 4 4 4 4 1 4 4 5 5 3 5 5 2 2 4 5 4 4 5


This produces the following generator matrix

0 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 0 0 0 0 16 16 16 16
0 7 9 8 8 8 8 10 10 10 10 6 6 6 6 12 12 12 12 4 4 4 4 3 3 3 3 13 13 13 13 14 14 14 14 2 2 2 2 5 5 5 5 11 11 11 11 1 15 16 16 16 16 16 16 16 16 0 0 0 0
16 0 0 1 5 13 9 15 11 3 7 1 5 13 9 14 10 2 6 14 10 2 6 1 5 13 9 14 10 2 6 1 5 13 9 15 11 3 7 14 10 2 6 1 5 13 9 0 0 15 11 3 7 15 11 3 7 15 11 3 7



Which is a code with the following weight distribution
1y61+1888x56y5+1424x57y4+512x58y3+320x59y2+256x60y1+512x61