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  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  2  1  1
 0  2  0  2  0  0  6  6  0  0  2  6  0  0  6  2  0  0  2  2  0  6  0  6  0  2  4  6  4  2  4  2  4  6  4  2  4  6  4  2  0  4  2  6  4  4  6  6  4  4  2  2  4  0  6  2  4  4  2  6  4  0  6  6  0  4  2  6  0  0  6  6  0  4  0  0
 0  0  2  2  0  6  6  0  0  6  2  0  0  2  6  0  4  6  6  4  4  2  2  4  4  6  2  4  6  4  4  2  4  6  2  0  4  2  6  0  4  6  2  4  0  6  2  0  4  2  6  4  0  2  2  4  0  2  6  0  0  6  6  4  0  2  2  0  0  6  2  4  0  2  6  0
 0  0  0  4  0  0  4  0  4  4  0  4  4  4  0  4  4  0  4  0  4  4  0  0  0  0  4  4  4  4  0  0  0  0  4  4  4  4  0  0  0  4  4  0  4  0  0  4  4  0  4  0  0  4  0  4  4  0  0  0  0  4  4  4  0  0  0  0  4  4  4  4  0  0  0  0
 0  0  0  0  4  4  4  4  4  4  0  4  0  0  4  0  0  0  0  0  4  4  4  4  4  0  4  0  0  4  0  4  4  0  0  4  4  0  0  4  0  4  4  0  0  4  4  0  0  0  4  4  4  4  0  0  4  4  4  0  0  0  0  4  0  0  0  4  4  4  4  0  4  0  4  0

generates a code of length 76 over Z8 who´s minimum homogenous weight is 72.

Homogenous weight enumerator: w(x)=1x^0+28x^72+24x^73+21x^74+104x^75+148x^76+104x^77+39x^78+24x^79+15x^80+3x^82+1x^150

The gray image is a code over GF(2) with n=304, k=9 and d=144.
This code was found by Heurico 1.16 in 0.202 seconds.