The generator matrix

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

generates a code of length 25 over GR(16,4) who´s minimum homogenous weight is 64.

Homogenous weight enumerator: w(x)=1x^0+1437x^64+1224x^66+4728x^68+3096x^70+11334x^72+5832x^74+17304x^76+6408x^78+11274x^80+1872x^82+1008x^84+18x^88

The gray image is a code over GF(4) with n=100, k=8 and d=64.
This code was found by Heurico 1.16 in 16.6 seconds.