The generator matrix

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

generates a code of length 68 over Z8 who´s minimum homogenous weight is 64.

Homogenous weight enumerator: w(x)=1x^0+81x^64+170x^65+206x^66+166x^67+80x^68+60x^69+24x^70+36x^71+27x^72+34x^73+55x^74+38x^75+34x^76+8x^77+2x^78+1x^80+1x^82

The gray image is a code over GF(2) with n=272, k=10 and d=128.
This code was found by Heurico 1.11 in 0.179 seconds.