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

generates a code of length 26 over GR(64,4) who´s minimum homogenous weight is 160.

Homogenous weight enumerator: w(x)=1x^0+336x^160+798x^168+3584x^175+784x^176+25088x^183+644x^184+819x^192+574x^200+140x^208

The gray image is a code over GF(8) with n=208, k=5 and d=160.
This code was found by Heurico 1.16 in 0.223 seconds.