The generator matrix

 1  0  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  X  1  1  1  1  1  1  1  1 a*X  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 a^2*X  1 a^3*X  1  1  1  1  1  1  1  1  1  1 a^4*X a^5*X
 0  1 a^6*X+1  a a^6*X+a^2 a^3 a^6*X+a^4 a^5 a^6*X+a^6  X a^5*X+1 X+a a^5*X+a^2 X+a^3 a^5*X+a^4 X+a^5 a^5*X+a^6  1 a*X a^4*X+1 a*X+a a^4*X+a^2 a*X+a^3 a^4*X+a^4 a*X+a^5 a^4*X+a^6  1 a^2*X a^3*X+1 a^2*X+a a^3*X+a^2 a^2*X+a^3 a^3*X+a^4 a^2*X+a^5 a^3*X+a^6 a^3*X a^2*X+1 a^3*X+a a^2*X+a^2 a^3*X+a^3 a^2*X+a^4 a^3*X+a^5 a^2*X+a^6 a^4*X a*X+1 a^4*X+a a*X+a^2 a^4*X+a^3 a*X+a^4 a^4*X+a^5 a*X+a^6 a^5*X X+1 a^5*X+a X+a^2 a^5*X+a^3 X+a^4 a^5*X+a^5 X+a^6 a^6*X  1 a^6*X+a a^2 a^6*X+a^3 a^4 a^6*X+a^5 a^6  0  1 a^6*X+1  1  X  a a^6*X+a^2 a^5*X+1 X+a a^5*X+a^2 a*X a^4*X+1 a*X+a a^4*X+a^2  1  1

generates a code of length 83 over F8[X]/(X^2) who´s minimum homogenous weight is 576.

Homogenous weight enumerator: w(x)=1x^0+700x^576+392x^580+1792x^581+1120x^584+56x^588+28x^600+7x^608

The gray image is a linear code over GF(8) with n=664, k=4 and d=576.
This code was found by Heurico 1.16 in 0.734 seconds.