The generator matrix

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

generates a code of length 26 over GR(16,4) who´s minimum homogenous weight is 64.

Homogenous weight enumerator: w(x)=1x^0+165x^64+144x^65+324x^67+1716x^68+732x^69+1152x^71+5313x^72+2160x^73+3192x^75+11742x^76+3816x^77+4464x^79+14628x^80+3744x^81+2916x^83+7200x^84+1692x^85+240x^87+96x^88+78x^92+18x^96+3x^104

The gray image is a code over GF(4) with n=104, k=8 and d=64.
This code was found by Heurico 1.16 in 5.98 seconds.