The generator matrix

 1  0  1  1  1  1  1  1  1  1  0  1  1  1  1  1  1  1  2  2  1  1  1
 0  1  1  a a+1  0 2a+3 a+1  2  a  1 2a+3  1  2 a+2 a+2 a+3 a+3  1  1  0  2 2a
 0  0 2a+2 2a  2  2  0 2a+2 2a 2a+2 2a+2  2 2a 2a+2  2  0 2a  0 2a  2 2a  2  0

generates a code of length 23 over GR(16,4) who´s minimum homogenous weight is 64.

Homogenous weight enumerator: w(x)=1x^0+51x^64+288x^65+108x^68+192x^69+60x^72+288x^73+36x^76

The gray image is a code over GF(4) with n=92, k=5 and d=64.
This code was found by Heurico 1.16 in 0 seconds.