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

generates a code of length 92 over Z8 who´s minimum homogenous weight is 78.

Homogenous weight enumerator: w(x)=1x^0+166x^78+601x^80+40x^81+990x^82+196x^83+1447x^84+392x^85+1925x^86+772x^87+2431x^88+1152x^89+3060x^90+1420x^91+3289x^92+1552x^93+3186x^94+1400x^95+2620x^96+776x^97+1872x^98+268x^99+1315x^100+168x^101+803x^102+36x^103+465x^104+16x^105+236x^106+4x^107+96x^108+38x^110+18x^112+10x^114+4x^116+2x^118+1x^124

The gray image is a code over GF(2) with n=368, k=15 and d=156.
This code was found by Heurico 1.16 in 99.7 seconds.