The generator matrix

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

generates a code of length 23 over Z8 who´s minimum homogenous weight is 20.

Homogenous weight enumerator: w(x)=1x^0+25x^20+32x^22+128x^23+59x^24+10x^28+1x^44

The gray image is a code over GF(2) with n=92, k=8 and d=40.
This code was found by Heurico 1.16 in 0.00549 seconds.