The generator matrix

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

generates a code of length 76 over Z8 who´s minimum homogenous weight is 60.

Homogenous weight enumerator: w(x)=1x^0+62x^60+44x^62+26x^63+226x^64+72x^65+321x^66+200x^67+730x^68+510x^69+1319x^70+1082x^71+2426x^72+1866x^73+3356x^74+2400x^75+3562x^76+2380x^77+3345x^78+1838x^79+2355x^80+1084x^81+1413x^82+536x^83+715x^84+214x^85+291x^86+62x^87+124x^88+18x^89+98x^90+34x^92+36x^94+4x^96+12x^98+1x^100+4x^102+1x^110

The gray image is a code over GF(2) with n=304, k=15 and d=120.
This code was found by Heurico 1.16 in 54.1 seconds.