The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+152x^52+16x^53+554x^54+244x^55+1160x^56+660x^57+1950x^58+1440x^59+2807x^60+2416x^61+3524x^62+2716x^63+3842x^64+2448x^65+2892x^66+1436x^67+1852x^68+688x^69+968x^70+176x^71+449x^72+44x^73+204x^74+4x^75+101x^76+18x^78+3x^80+2x^82+1x^88

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 43.5 seconds.