Code details

best found code with parameters
q=23 k=3 n=223
minimum distance = 212

this is new optimal code


the previous bounds were -1/212
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 1 0 1 0 0 0 1 1 1 1 0 1 0 1 1 0 0 1 1 0 0 1 0 0 0 0 0 0 0 0 1 1 1 2 11 11 2 11 8 6 11 10 11 11 10 10 11 10 11 11 10 10 10 0 11 10 11 9 9 9 8 7 11 10 11 11 10 9 11 11 10 8


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



Which is a code with the following weight distribution
1y223+5808x212y11+3388x213y10+1210x214y9+726x215y8+242x216y7+242x217y6+66x221y2+484x223