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

generates a code of length 33 over GR(64,4) who´s minimum homogenous weight is 192.

Homogenous weight enumerator: w(x)=1x^0+231x^192+1456x^200+2422x^208+3801x^216+3584x^217+4914x^224+50176x^225+6587x^232+175616x^233+6510x^240+4655x^248+1890x^256+301x^264

The gray image is a code over GF(8) with n=264, k=6 and d=192.
This code was found by Heurico 1.16 in 18.1 seconds.