The generator matrix

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

generates a code of length 57 over Z8 who´s minimum homogenous weight is 48.

Homogenous weight enumerator: w(x)=1x^0+95x^48+478x^49+697x^50+1320x^51+1479x^52+2168x^53+2327x^54+2946x^55+3079x^56+3486x^57+3155x^58+3166x^59+2403x^60+2214x^61+1323x^62+1142x^63+577x^64+340x^65+156x^66+122x^67+42x^68+18x^69+18x^70+8x^71+4x^72+4x^74

The gray image is a code over GF(2) with n=228, k=15 and d=96.
This code was found by Heurico 1.16 in 28.5 seconds.