The generator matrix

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

generates a code of length 77 over Z8 who´s minimum homogenous weight is 69.

Homogenous weight enumerator: w(x)=1x^0+96x^69+269x^70+410x^71+568x^72+616x^73+624x^74+712x^75+690x^76+586x^77+672x^78+718x^79+518x^80+444x^81+362x^82+260x^83+214x^84+152x^85+111x^86+68x^87+50x^88+22x^89+6x^90+8x^91+2x^93+4x^94+7x^96+2x^97

The gray image is a code over GF(2) with n=308, k=13 and d=138.
This code was found by Heurico 1.16 in 2.84 seconds.