The generator matrix

 1  0  1  1  1  6  1  1  0  1  1  6  1  1  0  1  1  6  1  1  0  1  1  6  1  1  4  1  1  2  1  1  4  1  1  2  1  1  1  1  1  1  1  1  4  2  4  2  2  2  0  2  2  2  0  2  0  2  2  2  2  2  2  2  2  1  1  1  1  4  1  1
 0  1  3  6  5  1  0  3  1  6  5  1  0  3  1  6  5  1  0  3  1  6  5  1  4  7  1  2  1  1  4  7  1  2  1  1  4  2  4  2  7  1  7  1  1  1  1  1  0  6  2  6  6  0  2  0  2  4  4  4  0  2  2  2  6  6  5  6  5  2  6  3
 0  0  4  0  4  0  4  0  4  4  0  4  0  0  0  4  0  0  4  4  4  0  4  4  4  4  4  4  4  4  0  0  0  0  0  0  4  4  0  0  4  4  0  0  4  4  0  0  0  4  0  4  0  4  4  4  4  4  4  0  0  4  4  0  0  0  0  0  4  0  4  0
 0  0  0  4  4  4  4  0  0  0  4  4  4  4  4  4  0  0  0  4  4  0  0  0  0  0  0  4  4  4  4  4  4  0  0  0  4  0  0  4  4  0  0  4  4  0  0  4  4  4  4  0  4  4  4  0  0  0  4  4  0  0  4  4  0  0  0  4  4  0  4  0

generates a code of length 72 over Z8 who´s minimum homogenous weight is 70.

Homogenous weight enumerator: w(x)=1x^0+67x^70+52x^71+31x^72+30x^73+48x^74+10x^75+8x^76+2x^77+1x^78+2x^79+4x^82

The gray image is a code over GF(2) with n=288, k=8 and d=140.
This code was found by Heurico 1.16 in 0.135 seconds.