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

generates a code of length 72 over Z4[X]/(X^2+2) who´s minimum homogenous weight is 70.

Homogenous weight enumerator: w(x)=1x^0+36x^70+54x^71+89x^72+30x^73+27x^74+10x^75+6x^76+2x^85+1x^106

The gray image is a code over GF(2) with n=576, k=8 and d=280.
This code was found by Heurico 1.16 in 0.265 seconds.