The generator matrix

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

generates a code of length 10 over GR(64,4) who´s minimum homogenous weight is 64.

Homogenous weight enumerator: w(x)=1x^0+315x^64+3584x^70+196x^80

The gray image is a code over GF(8) with n=80, k=4 and d=64.
This code was found by Heurico 1.16 in 0.00068 seconds.