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

generates a code of length 95 over GR(64,4) who´s minimum homogenous weight is 632.

Homogenous weight enumerator: w(x)=1x^0+119x^632+588x^640+56x^644+770x^648+1176x^652+644x^656+8232x^660+588x^664+19208x^668+280x^672+322x^680+161x^688+154x^696+175x^704+119x^712+84x^720+35x^728+28x^736+21x^744+7x^752

The gray image is a code over GF(8) with n=760, k=5 and d=632.
This code was found by Heurico 1.16 in 1.14 seconds.