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  X  1  X  1  1  1  1  X  1  1  X  1  1  1  X  1  1  X  X  X  1 2X+2  X  X  0  X 2X+2 2X  1  X  1  1  X  X 2X+2  X  X 2X+2  0 2X+2 2X  X  X  1  1  1  1 2X+2 2X+2 2X  0  X  X 2X+2  X  X  X  X  X  X  1  1
 0  2 2X 2X+2  0  2 2X 2X+2  0  2 2X 2X+2  0  2 2X 2X+2  0  2 2X 2X+2  0  2 2X 2X+2  2  0 2X+2  2 2X 2X+2  0  2  2 2X 2X+2 2X+2  0  2  2 2X 2X+2  0 2X 2X+2  0  2 2X  0 2X+2  2 2X+2 2X+2 2X 2X+2  2 2X+2  0 2X 2X  2 2X+2  2 2X+2 2X+2 2X+2  0 2X  0 2X  2 2X+2 2X  0 2X 2X  0 2X  0  2 2X+2  0 2X  2  0  2  0

generates a code of length 86 over Z4[X]/(X^2+2X+2) who´s minimum homogenous weight is 86.

Homogenous weight enumerator: w(x)=1x^0+34x^86+4x^87+16x^88+4x^89+2x^90+1x^92+2x^98

The gray image is a code over GF(2) with n=688, k=6 and d=344.
This code was found by Heurico 1.16 in 0.515 seconds.