The generator matrix

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

generates a code of length 22 over GR(64,4) who´s minimum homogenous weight is 142.

Homogenous weight enumerator: w(x)=1x^0+1680x^142+168x^144+896x^147+5600x^150+182x^152+7168x^154+6272x^155+10640x^158+63x^160+42x^168+56x^176

The gray image is a code over GF(8) with n=176, k=5 and d=142.
This code was found by Heurico 1.16 in 2.94 seconds.