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  2  4  2  4  2  4  1  2  2  2  4  2  2  2  2  4  0  4  1  2  2  0  1  1  0  1  1  1  1  0  1  4  4  0  1  0  1  1  1
 0  2  0  0  0  0  0  0  0  2  2  6  6  6  0  2  6  0  4  6  6  4  6  2  6  6  6  0  4  0  4  0  6  0  4  4  6  0  6  6  2  4  4  2  4  0  6  0  4  4  6  4  0  2  0  2  2  0  2  6  6  0  2  0  4  2  2  2  2  2  4  6  0  2  2  4  2  6  4  4  0  2  6  4  2  2  6  0  2  0  0
 0  0  2  0  0  0  2  6  2  2  2  4  2  6  0  0  0  4  2  6  2  0  6  4  6  4  4  4  6  2  6  4  4  0  2  2  0  4  4  2  4  2  6  0  4  2  4  6  4  2  6  4  4  0  6  2  6  0  4  0  0  2  6  2  2  6  6  2  0  0  0  4  0  4  4  4  4  4  6  4  6  4  4  2  6  4  6  0  4  4  0
 0  0  0  2  0  2  2  6  0  0  2  2  0  2  0  4  6  6  2  0  6  6  0  4  6  2  0  4  2  0  2  4  4  4  4  4  6  4  6  0  6  0  4  2  6  6  0  4  2  4  2  6  4  6  2  4  4  2  2  2  0  0  0  2  2  4  6  6  4  4  0  0  0  4  2  2  0  0  4  6  0  6  2  0  6  4  6  0  0  2  0
 0  0  0  0  2  2  0  6  2  0  2  2  2  4  4  6  0  6  6  0  2  0  2  6  4  0  4  2  0  0  2  6  0  0  0  2  4  2  6  4  6  6  6  2  4  4  2  0  6  2  2  0  6  0  6  4  0  2  4  6  4  0  2  0  4  2  4  4  2  2  6  0  6  0  2  6  6  4  6  6  6  0  6  4  2  0  2  2  2  0  0
 0  0  0  0  0  4  0  0  0  4  4  0  4  4  4  4  4  4  0  0  0  4  0  4  4  0  4  0  4  0  0  0  0  4  4  0  4  4  4  4  0  0  0  4  4  4  4  4  4  4  4  4  0  4  0  4  0  0  4  0  0  4  0  0  4  4  4  0  4  0  4  4  0  4  0  0  0  4  4  0  4  0  4  4  0  4  4  4  0  4  0
 0  0  0  0  0  0  4  0  0  0  0  0  4  0  0  0  4  4  4  0  0  0  4  4  4  0  0  0  4  4  0  4  0  4  0  4  0  0  4  4  0  0  4  4  4  0  0  4  0  4  0  0  4  0  0  0  4  4  0  4  4  0  0  4  4  4  0  0  4  0  4  4  0  4  4  0  4  4  4  4  4  4  0  0  4  4  4  4  4  4  0
 0  0  0  0  0  0  0  4  0  4  0  4  0  0  4  4  4  4  0  0  4  0  4  0  4  4  4  0  4  4  4  4  0  0  4  4  0  4  0  4  0  4  0  0  0  4  0  4  4  4  4  0  0  4  0  0  0  0  4  0  0  0  0  4  0  0  4  0  4  4  4  4  0  0  4  0  0  0  4  4  4  4  0  0  0  4  0  0  4  4  0
 0  0  0  0  0  0  0  0  4  0  0  0  0  4  0  0  4  4  4  4  4  4  4  4  0  4  0  4  0  0  4  0  4  0  0  0  4  0  0  4  0  0  4  4  4  4  0  4  0  4  4  0  0  4  0  4  0  0  4  0  0  4  0  4  0  4  4  0  0  0  4  4  4  0  4  0  0  4  0  0  4  0  0  0  4  0  0  4  0  0  0

generates a code of length 91 over Z8 who´s minimum homogenous weight is 76.

Homogenous weight enumerator: w(x)=1x^0+65x^76+96x^77+194x^78+268x^79+380x^80+472x^81+626x^82+760x^83+910x^84+1098x^85+1370x^86+1720x^87+2079x^88+2388x^89+2599x^90+2686x^91+2598x^92+2424x^93+2040x^94+1880x^95+1434x^96+1184x^97+911x^98+640x^99+523x^100+390x^101+331x^102+196x^103+157x^104+112x^105+92x^106+42x^107+35x^108+24x^109+24x^110+5x^112+4x^113+2x^114+5x^116+1x^118+1x^122+1x^130

The gray image is a code over GF(2) with n=364, k=15 and d=152.
This code was found by Heurico 1.16 in 96.5 seconds.