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

generates a code of length 29 over GR(64,4) who´s minimum homogenous weight is 184.

Homogenous weight enumerator: w(x)=1x^0+560x^184+1183x^192+3584x^196+560x^200+25088x^204+476x^208+560x^216+756x^224

The gray image is a code over GF(8) with n=232, k=5 and d=184.
This code was found by Heurico 1.16 in 64.8 seconds.