The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  X  X  X  1  1  1  1  X  X  X  1  1  1  X  X  X  1  2  2  2  X  1  X  X  X  X  1  1  1  X 2X 2X 2X  2  2  0  0  0  2
 0 2X  0 2X  0  0 2X 2X  0  0 2X 2X  0  0 2X 2X  0  0 2X 2X  0 2X 2X  0  0 2X 2X  0 2X 2X  0  0 2X  0 2X 2X 2X  0 2X 2X  0  0  0  0 2X 2X  0 2X 2X  0  0 2X 2X  0 2X 2X  0 2X  0
 0  0 2X 2X  0 2X 2X  0  0 2X 2X  0  0 2X 2X  0  0 2X 2X  0 2X 2X  0  0 2X 2X  0 2X 2X  0  0 2X 2X 2X 2X  0  0 2X 2X  0  0  0  0 2X 2X  0 2X 2X  0  0 2X 2X  0 2X 2X 2X 2X  0  0

generates a code of length 59 over Z4[X]/(X^2+2) who´s minimum homogenous weight is 59.

Homogenous weight enumerator: w(x)=1x^0+40x^59+4x^60+8x^61+8x^62+3x^64

The gray image is a code over GF(2) with n=472, k=6 and d=236.
This code was found by Heurico 1.16 in 0.094 seconds.