The generator matrix

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

generates a code of length 25 over GR(64,4) who´s minimum homogenous weight is 152.

Homogenous weight enumerator: w(x)=1x^0+266x^152+280x^154+224x^155+756x^160+1344x^161+5880x^162+2016x^163+721x^168+18816x^169+41160x^170+9632x^171+728x^176+65856x^177+96040x^178+16800x^179+840x^184+651x^192+133x^200

The gray image is a code over GF(8) with n=200, k=6 and d=152.
This code was found by Heurico 1.16 in 4.95 seconds.