The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  0  1  1 12  1  1  2  1  2
 0  2  0  2  8  8 10 10  4 14  4  6  4  6 12  6  0 10  0  2  0  2  4  2 12  6  4 14  4  8 14  6  8  8 10  2  6 12 12  6  6  4  2  4  0 14  0 10  2  0 14  8  2 10  0 12  6 14  0  4  4  2  6 12  6 14 12 12  4 10  2  2 12  8  2  0 12 10 12 14
 0  0  2  2  4 14  6 12  4 10  2  8 14  4  0 14  0  6  6  4  2  0  8 10  4  2 14 12  2  4  0  6  8  6  0  6  0  8 14 14 10 10  4 12 10 12  4 10 14 14  4  8 12  2 12 14  2 14 10 10  8  8  0 12  8  8  4  6  6 12  8  0 10 10  0 14 12  0 10  4
 0  0  0  8  8  8  0  8  0  0  8  8  0  0  8  8  8  8  0  0  8  8  0  0  8  8  8  8  0  0  0  0  8  8  8  8  0  0  0  0  8  0  8  8  8  0  0  0  0  0  8  0  0  8  8  8  0  8  0  8  8  0  8  0  0  8  0  0  8  0  8  0  8  8  8  8  8  8  0  8

generates a code of length 80 over Z16 who´s minimum homogenous weight is 76.

Homogenous weight enumerator: w(x)=1x^0+207x^76+258x^78+384x^79+361x^80+384x^81+260x^82+164x^84+26x^86+1x^88+1x^92+1x^152

The gray image is a code over GF(2) with n=640, k=11 and d=304.
This code was found by Heurico 1.16 in 0.555 seconds.