The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+222x^64+236x^65+462x^66+288x^67+564x^68+324x^69+376x^70+240x^71+346x^72+200x^73+236x^74+148x^75+155x^76+68x^77+130x^78+24x^79+43x^80+4x^81+10x^82+4x^83+12x^84+2x^86+1x^92

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 0.903 seconds.