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

generates a code of length 75 over Z4[X]/(X^2+2,2X) who´s minimum homogenous weight is 75.

Homogenous weight enumerator: w(x)=1x^0+32x^75+23x^76+7x^80+1x^92

The gray image is a code over GF(2) with n=300, k=6 and d=150.
This code was found by Heurico 1.16 in 0.197 seconds.