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

generates a code of length 78 over Z8 who´s minimum homogenous weight is 70.

Homogenous weight enumerator: w(x)=1x^0+20x^70+84x^71+82x^72+132x^73+159x^74+154x^75+174x^76+190x^77+144x^78+180x^79+245x^80+122x^81+94x^82+50x^83+56x^84+40x^85+20x^86+28x^87+16x^88+14x^89+11x^90+16x^91+1x^92+14x^93+1x^124

The gray image is a code over GF(2) with n=312, k=11 and d=140.
This code was found by Heurico 1.16 in 0.509 seconds.