The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+90x^48+422x^49+839x^50+1130x^51+1576x^52+2132x^53+2534x^54+2920x^55+3171x^56+3242x^57+3119x^58+2912x^59+2645x^60+2154x^61+1575x^62+998x^63+598x^64+372x^65+178x^66+68x^67+43x^68+26x^69+11x^70+2x^71+4x^72+4x^73+2x^75

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 28.4 seconds.