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

generates a code of length 60 over Z8 who´s minimum homogenous weight is 52.

Homogenous weight enumerator: w(x)=1x^0+168x^52+20x^53+248x^54+84x^55+405x^56+180x^57+488x^58+244x^59+569x^60+220x^61+452x^62+156x^63+345x^64+92x^65+164x^66+28x^67+130x^68+52x^70+38x^72+4x^74+5x^76+2x^80+1x^88

The gray image is a code over GF(2) with n=240, k=12 and d=104.
This code was found by Heurico 1.16 in 39.3 seconds.