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  1  1  1  1  1  1  1  1  1  1  1  1  1  2  1  2  1  1  2
 0  2  0  0  2  2 2a 2a^2 2a^2+2a 2a^2+2a+2 2a^2+2a+2  2 2a^2+2a+2  0 2a 2a^2+2a  0 2a+2 2a^2+2a 2a^2+2a+2 2a 2a^2+2 2a 2a^2+2a 2a^2+2a  0  2 2a  2 2a^2+2a+2 2a^2+2a  2  0  2 2a  2 2a+2  2 2a^2+2 2a+2  2
 0  0  2  0 2a^2+2 2a^2+2a+2 2a 2a^2+2 2a^2+2 2a 2a^2+2 2a^2 2a 2a^2+2a+2 2a 2a  2  0 2a^2+2a+2 2a^2 2a^2+2a  0 2a^2+2a+2 2a^2+2a+2 2a^2+2a 2a^2+2a 2a+2 2a^2+2a+2  0  2 2a^2+2 2a 2a^2 2a^2  2 2a^2+2 2a^2  0 2a+2 2a+2 2a+2
 0  0  0  2  2 2a^2+2a 2a^2+2a  2 2a^2+2 2a^2+2a 2a^2+2 2a^2+2 2a+2  2  2  0 2a^2+2a 2a^2+2 2a 2a^2  0 2a^2+2 2a+2 2a^2+2a  0 2a^2+2a+2 2a+2 2a 2a^2 2a+2 2a^2+2a  0 2a 2a^2+2a 2a^2+2a+2 2a^2+2a+2  0 2a^2 2a^2+2a+2 2a+2 2a^2+2a

generates a code of length 41 over GR(64,4) who´s minimum homogenous weight is 264.

Homogenous weight enumerator: w(x)=1x^0+497x^264+56x^266+784x^272+1176x^274+721x^280+8232x^282+539x^288+19208x^290+546x^296+490x^304+329x^312+154x^320+35x^328

The gray image is a code over GF(8) with n=328, k=5 and d=264.
This code was found by Heurico 1.16 in 0.4 seconds.