The generator matrix

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

generates a code of length 85 over GR(64,4) who´s minimum homogenous weight is 583.

Homogenous weight enumerator: w(x)=1x^0+2576x^583+735x^584+6272x^587+5992x^591+1253x^592+1792x^595+1792x^599+1988x^600+6272x^603+3976x^607+49x^608+42x^616+14x^624+7x^632+7x^640

The gray image is a code over GF(8) with n=680, k=5 and d=583.
This code was found by Heurico 1.16 in 74.1 seconds.