The generator matrix

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

generates a code of length 53 over GR(16,4) who´s minimum homogenous weight is 148.

Homogenous weight enumerator: w(x)=1x^0+360x^148+792x^149+300x^150+168x^151+843x^152+1668x^153+480x^154+108x^155+1017x^156+1992x^157+636x^158+264x^159+1002x^160+1572x^161+348x^162+48x^163+939x^164+1572x^165+336x^166+144x^167+465x^168+648x^169+180x^170+36x^171+219x^172+204x^173+24x^174+9x^176+9x^180

The gray image is a code over GF(4) with n=212, k=7 and d=148.
This code was found by Heurico 1.16 in 2 seconds.