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

generates a code of length 41 over GR(64,4) who´s minimum homogenous weight is 264.

Homogenous weight enumerator: w(x)=1x^0+462x^264+112x^266+448x^267+1568x^268+2184x^269+819x^272+2352x^274+4032x^275+8736x^276+6888x^277+721x^280+16464x^282+19264x^283+31584x^284+22680x^285+581x^288+38416x^290+33600x^291+44128x^292+25592x^293+560x^296+413x^304+301x^312+210x^320+28x^328

The gray image is a code over GF(8) with n=328, k=6 and d=264.
This code was found by Heurico 1.16 in 8.72 seconds.