The generator matrix

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

generates a code of length 71 over Z8 who´s minimum homogenous weight is 64.

Homogenous weight enumerator: w(x)=1x^0+236x^64+348x^65+630x^66+660x^67+769x^68+632x^69+830x^70+536x^71+741x^72+544x^73+580x^74+376x^75+407x^76+296x^77+204x^78+152x^79+142x^80+36x^81+56x^82+4x^83+8x^84+2x^86+2x^90

The gray image is a code over GF(2) with n=284, k=13 and d=128.
This code was found by Heurico 1.16 in 2.55 seconds.