The generator matrix

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

generates a code of length 24 over GR(64,4) who´s minimum homogenous weight is 154.

Homogenous weight enumerator: w(x)=1x^0+168x^154+4536x^155+10752x^156+224x^160+448x^161+2352x^162+27216x^163+35840x^164+36029x^168+3136x^169+8232x^170+65016x^171+68096x^172+21x^176+7x^184+70x^192

The gray image is a code over GF(8) with n=192, k=6 and d=154.
This code was found by Heurico 1.16 in 3.46 seconds.