Code details

best found code with parameters
q=23 k=3 n=58
minimum distance = 54

this is new optimal code


the previous bounds were -1/54
this is a projective code


We used the prescribed group of automorphisms with the following generators


22 0 0
0 0 22
0 22 0

16 0 0
0 12 0
0 0 20

This group makes 39 orbits of sizes:

2 11 11 1 22 11 11 11 11 22 22 22 11 22 11 22 22 11 11 22 22 11 11 22 11 22 11 11 11 11 22 22 11 11 11 11 11 11 11


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

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


This produces the following generator matrix

0 0 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22
0 22 0 22 2 16 4 18 6 10 20 14 8 12 22 2 16 4 1 18 19 6 10 3 9 20 14 21 17 8 7 12 15 5 13 11 1 19 3 9 21 17 7 15 5 13 11 22 2 16 4 18 6 10 20 14 8 12
22 0 0 6 4 12 2 10 22 18 8 14 20 16 15 13 21 11 14 19 18 9 5 12 6 17 1 16 20 7 8 3 22 10 2 4 1 5 21 15 3 7 17 9 19 11 13 20 18 4 16 2 14 10 22 6 12 8



Which is a code with the following weight distribution
1y58+4114x54y4+3388x55y3+1518x56y2+968x57y1+2178x58