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

generates a code of length 73 over Z4[X]/(X^2+2) who´s minimum homogenous weight is 68.

Homogenous weight enumerator: w(x)=1x^0+186x^68+88x^70+96x^71+530x^72+320x^73+416x^74+96x^75+226x^76+8x^78+68x^80+12x^84+1x^128

The gray image is a code over GF(2) with n=584, k=11 and d=272.
This code was found by Heurico 1.16 in 4.26 seconds.