The generator matrix

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

generates a code of length 70 over Z8 who´s minimum homogenous weight is 64.

Homogenous weight enumerator: w(x)=1x^0+144x^64+380x^65+378x^66+414x^67+362x^68+440x^69+323x^70+312x^71+290x^72+258x^73+165x^74+182x^75+139x^76+100x^77+69x^78+64x^79+29x^80+18x^81+17x^82+4x^83+1x^84+4x^85+2x^88

The gray image is a code over GF(2) with n=280, k=12 and d=128.
This code was found by Heurico 1.16 in 0.625 seconds.