The generator matrix

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

generates a code of length 93 over F8[X]/(X^2) who´s minimum homogenous weight is 639.

Homogenous weight enumerator: w(x)=1x^0+3080x^639+1932x^640+6048x^644+4872x^647+2996x^648+2520x^655+686x^656+4704x^660+3864x^663+1988x^664+77x^672

The gray image is a linear code over GF(8) with n=744, k=5 and d=639.
This code was found by Heurico 1.16 in 86.8 seconds.