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  X  X  X  X  X  X  X  X  X  X  X  X  X  X  X  X  X  X  X  X  X  X  X  X  X  X  X  X  X  X  X  X  1  1  1  1  X X^2  X  X  1
 0 X^3+X^2  0 X^2  0  0 X^2 X^3+X^2  0  0 X^2 X^3+X^2  0  0 X^2 X^3+X^2 X^3 X^3 X^3+X^2 X^2 X^3 X^3 X^3+X^2 X^2 X^3 X^3 X^3+X^2 X^2 X^3 X^3 X^3+X^2 X^2 X^3 X^2 X^3+X^2  0 X^2 X^2 X^3+X^2 X^3 X^2  0 X^3+X^2 X^3+X^2  0  0 X^3 X^3 X^3 X^2 X^3+X^2 X^3+X^2  0 X^2 X^3+X^2 X^3 X^2  0 X^3+X^2 X^2  0  0 X^3 X^3  0 X^3 X^2 X^3+X^2 X^3  0 X^2 X^2  0
 0  0 X^3+X^2 X^2  0 X^3+X^2 X^2  0 X^3 X^2 X^3+X^2 X^3 X^3 X^2 X^3+X^2 X^3 X^3 X^2 X^3+X^2 X^3 X^3 X^2 X^3+X^2 X^3  0 X^3+X^2 X^2  0  0 X^3+X^2 X^2  0 X^2 X^2  0 X^3+X^2 X^3 X^3+X^2  0 X^2 X^2 X^2 X^2 X^3  0 X^3 X^3  0 X^3+X^2 X^3 X^3+X^2 X^2 X^3+X^2  0 X^3 X^3+X^2 X^3+X^2 X^2 X^3+X^2  0  0 X^3 X^3  0  0 X^2 X^2  0 X^2 X^3+X^2 X^2 X^3+X^2  0
 0  0  0 X^3 X^3 X^3  0 X^3 X^3 X^3 X^3 X^3  0  0  0  0  0  0  0  0 X^3 X^3 X^3 X^3 X^3 X^3 X^3 X^3  0  0  0  0  0  0 X^3  0 X^3  0  0 X^3 X^3 X^3 X^3  0 X^3 X^3 X^3 X^3 X^3  0  0  0 X^3  0 X^3  0 X^3  0 X^3 X^3  0  0  0  0  0  0  0 X^3 X^3  0 X^3  0  0

generates a code of length 73 over Z2[X]/(X^4) who´s minimum homogenous weight is 70.

Homogenous weight enumerator: w(x)=1x^0+23x^70+24x^71+139x^72+148x^73+132x^74+14x^75+20x^76+4x^77+5x^78+2x^107

The gray image is a linear code over GF(2) with n=584, k=9 and d=280.
This code was found by Heurico 1.16 in 0.375 seconds.