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

generates a code of length 46 over GR(64,4) who´s minimum homogenous weight is 296.

Homogenous weight enumerator: w(x)=1x^0+273x^296+798x^304+630x^312+686x^320+28672x^322+609x^328+364x^336+308x^344+315x^352+84x^360+28x^368

The gray image is a code over GF(8) with n=368, k=5 and d=296.
This code was found by Heurico 1.16 in 0.457 seconds.