The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  2  1  1  2  4
 0  2  0  6  0  6  4  6  0  6  0  6  0  6  4  2  0  4  0  4  6  6  4
 0  0  4  0  0  0  4  0  0  4  4  4  0  4  4  4  4  4  4  0  0  4  4
 0  0  0  4  0  0  0  4  4  4  4  4  4  0  4  0  4  0  0  4  0  0  0
 0  0  0  0  4  4  4  4  4  0  0  4  0  4  4  0  4  0  0  0  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+28x^20+16x^21+75x^22+32x^23+60x^24+16x^25+18x^26+6x^28+3x^30+1x^40

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 0.00394 seconds.