The generator matrix

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

generates a code of length 47 over GR(16,4) who´s minimum homogenous weight is 123.

Homogenous weight enumerator: w(x)=1x^0+348x^123+741x^124+204x^125+972x^126+2400x^127+3207x^128+1284x^129+3000x^130+6324x^131+7176x^132+3456x^133+6888x^134+12120x^135+13482x^136+7140x^137+11568x^138+19512x^139+20556x^140+10716x^141+14748x^142+21792x^143+21534x^144+9756x^145+12408x^146+16740x^147+12693x^148+3960x^149+5136x^150+6024x^151+3939x^152+348x^153+576x^154+756x^155+564x^156+33x^160+27x^164+3x^168+3x^172+9x^176

The gray image is a code over GF(4) with n=188, k=9 and d=123.
This code was found by Heurico 1.16 in 170 seconds.