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

generates a code of length 38 over GR(16,4) who´s minimum homogenous weight is 100.

Homogenous weight enumerator: w(x)=1x^0+72x^100+183x^104+177x^108+768x^111+162x^112+2304x^115+84x^116+117x^120+87x^124+54x^128+45x^132+24x^136+12x^140+3x^144+3x^148

The gray image is a code over GF(4) with n=152, k=6 and d=100.
This code was found by Heurico 1.16 in 0.104 seconds.