The generator matrix

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

generates a code of length 80 over Z16 who´s minimum homogenous weight is 71.

Homogenous weight enumerator: w(x)=1x^0+264x^71+1364x^72+3012x^73+6110x^74+9832x^75+15735x^76+20598x^77+26899x^78+30244x^79+33171x^80+30570x^81+28768x^82+20682x^83+15080x^84+9606x^85+5256x^86+2498x^87+1438x^88+586x^89+240x^90+86x^91+53x^92+12x^93+15x^94+10x^95+6x^96+6x^98+2x^102

The gray image is a code over GF(2) with n=640, k=18 and d=284.
This code was found by Heurico 1.16 in 706 seconds.