The generator matrix

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

generates a code of length 65 over Z2[X]/(X^4) who´s minimum homogenous weight is 64.

Homogenous weight enumerator: w(x)=1x^0+13x^64+220x^65+14x^66+2x^72+4x^73+2x^74

The gray image is a linear code over GF(2) with n=520, k=8 and d=256.
This code was found by Heurico 1.16 in 0.235 seconds.