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

generates a code of length 71 over Z8 who´s minimum homogenous weight is 58.

Homogenous weight enumerator: w(x)=1x^0+67x^58+182x^59+265x^60+378x^61+470x^62+554x^63+727x^64+970x^65+1271x^66+1694x^67+2225x^68+2734x^69+3145x^70+3250x^71+3250x^72+2906x^73+2213x^74+1776x^75+1243x^76+866x^77+752x^78+556x^79+383x^80+272x^81+229x^82+164x^83+91x^84+60x^85+41x^86+16x^87+6x^88+4x^89+4x^90+2x^93+1x^112

The gray image is a code over GF(2) with n=284, k=15 and d=116.
This code was found by Heurico 1.16 in 70.4 seconds.