The generator matrix

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

generates a code of length 47 over GR(16,4) who´s minimum homogenous weight is 131.

Homogenous weight enumerator: w(x)=1x^0+1044x^131+501x^132+2472x^135+822x^136+2736x^139+1038x^140+2640x^143+852x^144+2292x^147+648x^148+936x^151+210x^152+168x^155+18x^156+3x^160+3x^164

The gray image is a code over GF(4) with n=188, k=7 and d=131.
This code was found by Heurico 1.16 in 81 seconds.