The generator matrix

 1  0  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  0  1  1  2 2a  1  1
 0  1  1  a 3a^2+2 2a^2+3a+1 a^2+3a a^2+3a+3 3a^2+2a+3  0 2a^2+3  a 3a^2+2 a^2+3a 3a^2+2a+3 2a^2+3a+1 a^2+3a+3  2 3a^2+2a+2 2a^2+3a+3 2a^2+3 a^2+3a+1 a+2  2 a^2+a 3a^2+1  1  1  2 2a^2+2a+3
 0  0 2a^2+2 2a  2  0 2a+2 2a^2+2a+2 2a^2+2a 2a^2 2a 2a^2+2a 2a+2  2 2a^2+2 2a^2+2a+2 2a^2 2a^2+2 2a^2+2a  2 2a+2  0 2a^2+2a+2 2a 2a^2 2a 2a^2+2 2a 2a^2+2a+2 2a^2

generates a code of length 30 over GR(64,4) who´s minimum homogenous weight is 198.

Homogenous weight enumerator: w(x)=1x^0+2352x^198+1120x^199+98x^200+7840x^206+2240x^207+343x^208+14896x^214+3808x^215+7x^224+14x^232+49x^240

The gray image is a code over GF(8) with n=240, k=5 and d=198.
This code was found by Heurico 1.16 in 0.0949 seconds.