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

generates a code of length 75 over Z8 who´s minimum homogenous weight is 60.

Homogenous weight enumerator: w(x)=1x^0+95x^60+32x^61+162x^62+128x^63+330x^64+332x^65+491x^66+652x^67+956x^68+1116x^69+1441x^70+1856x^71+2119x^72+2644x^73+2567x^74+2888x^75+2642x^76+2520x^77+2222x^78+1952x^79+1432x^80+1236x^81+878x^82+572x^83+457x^84+268x^85+287x^86+128x^87+131x^88+44x^89+103x^90+16x^91+25x^92+30x^94+3x^96+9x^98+1x^100+2x^102

The gray image is a code over GF(2) with n=300, k=15 and d=120.
This code was found by Heurico 1.16 in 75.8 seconds.