The generator matrix

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

generates a code of length 51 over Z2[X]/(X^4) who´s minimum homogenous weight is 50.

Homogenous weight enumerator: w(x)=1x^0+6x^50+104x^51+6x^52+1x^54+8x^55+1x^56+1x^62

The gray image is a linear code over GF(2) with n=408, k=7 and d=200.
This code was found by Heurico 1.16 in 0.094 seconds.