The generator matrix

 1  0  1  1  1  0  1  1  4  1  0  1  2  1  1  6  1  1  6  1  1  1  1  2  1  1  1  1  1  0  0  1  1  6  2  1  1  1  1  6  1  6  1  1  1  1  1  1  1  0  1  2  2  1  0  2  4  2  4  1  4  4  4
 0  1  1  0  1  1  3  0  1  3  1  0  1  2  7  1  1  2  1  6  5  3  6  1  6  6  0  3  2  1  1  3  5  1  1  2  7  4  3  1  7  1  2  1  3  6  2  5  5  1  6  1  1  1  1  1  2  1  1  0  0  1  1
 0  0  2  0  0  0  0  6  2  2  2  2  4  2  6  6  4  4  4  0  6  4  6  6  2  6  4  0  2  2  4  4  4  2  6  4  6  0  2  4  4  0  6  4  2  0  6  4  4  6  0  6  6  6  0  2  2  2  6  2  0  2  6
 0  0  0  2  0  6  2  6  2  6  4  0  2  2  0  0  4  2  0  0  6  6  4  6  6  0  2  4  0  2  2  0  0  6  4  4  4  0  2  0  0  6  6  2  2  2  4  6  4  6  4  0  0  0  4  0  6  4  4  2  0  6  4
 0  0  0  0  2  0  2  6  2  4  6  2  0  2  0  6  6  4  4  4  0  2  2  6  6  2  4  6  4  4  2  4  4  0  0  2  2  2  6  0  2  0  0  2  2  0  0  4  4  6  2  6  0  2  6  6  4  0  2  0  2  6  0
 0  0  0  0  0  4  0  0  0  0  0  0  0  0  0  0  0  0  0  0  4  4  4  4  4  4  4  4  4  4  4  4  0  0  0  4  0  0  4  4  0  4  0  0  4  4  4  0  0  0  0  4  4  4  4  4  4  4  4  4  4  4  0
 0  0  0  0  0  0  4  0  4  4  0  0  4  0  4  4  4  4  4  4  0  0  4  0  4  0  0  0  0  4  0  4  4  4  0  4  4  4  0  4  4  4  4  4  4  4  0  0  4  0  4  0  4  0  4  0  4  0  4  4  4  4  0
 0  0  0  0  0  0  0  4  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  4  4  4  4  4  4  4  4  4  4  4  4  4  0  4  0  4  0  4  0  4  0  4  4  4  0  4  0  4  0  4  0  4  4

generates a code of length 63 over Z8 who´s minimum homogenous weight is 52.

Homogenous weight enumerator: w(x)=1x^0+163x^52+12x^53+534x^54+216x^55+1039x^56+604x^57+1948x^58+1316x^59+2855x^60+2496x^61+3696x^62+3024x^63+3695x^64+2384x^65+3095x^66+1432x^67+1792x^68+628x^69+920x^70+152x^71+473x^72+20x^73+156x^74+4x^75+82x^76+18x^78+8x^80+1x^82+3x^84+1x^92

The gray image is a code over GF(2) with n=252, k=15 and d=104.
This code was found by Heurico 1.16 in 43.2 seconds.