The generator matrix

 1  0  1  1  1  8  1  1 14  1  1  2  2  1  1  1  1  4  1  1  4  1 14  1  8  1  1  1  1 10  1  2  1  1  1  1  4  6  1 14  1  1  1  8  1  1  8  1  1  8  1  1 12  1  6  0  1  1  2  1  1  1  1  1  1  1  1  8  1  1  1 12  1  2 14  1 12  1  8  1
 0  1  1  4  3  1  2  7  1  6  9  1  1  0  9  6  7  1 12  1  1 10  1 11  1 13  0 11  4  1 13  1  8 13 10  7  1  1 10  1  5  4 11  1 10 11  1 10 15  1  6 14  1  2  1  1  0  9 14 15 15 13 15  5  5 11  3  2 13 12 12 12 14  1  1  4  1  3  1  9
 0  0  2 10  8 10 10  2 12  0  8  0  2  4  6 12 14 10  6 12 14 14 10  4  4  4 14  6 12  6  2  4 10 14  4 12 12  6  0  0  8  0  2  6 10  8  0  6  4 12  6  2  0  0 10  2 12 10  8  0  6  8 14  6 10 12  2  2 12  4  2  2 10 10 14  8  8  6  8  0

generates a code of length 80 over Z16 who´s minimum homogenous weight is 77.

Homogenous weight enumerator: w(x)=1x^0+462x^77+210x^78+336x^79+116x^80+394x^81+154x^82+256x^83+24x^84+58x^85+2x^86+12x^87+2x^88+10x^89+4x^91+4x^93+1x^96+2x^106

The gray image is a code over GF(2) with n=640, k=11 and d=308.
This code was found by Heurico 1.16 in 69.5 seconds.