The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  2  1  1  0  1  1  2  1  1  0  1  1  1  1  1  1  1  1  1  2  0  2  1  1  1  1  1  1  0  2  1  1  1  0  2  1  1  2  1  1  1  1  1  0  1  0  2  0  1  1  1  1  2  1  0  1  1  1  1  2  2  2  1  2  1  1  1  1  1  1  1  1
 0  2  0  6  0  6  0  6  0  6  0  6  4  6  0  6  6  0  4  2  6  6  0  2  4  6  6  6  0  2  4  0  6  6  4  4  4  6  6  6  2  6  4  2  4  6  6  4  2  6  0  2  2  2  6  2  6  4  6  4  6  0  4  2  2  2  0  2  0  0  0  6  6  4  2  0  2  2  6  6  6  4  0  6  0  0  0  0  0  0  0  0
 0  0  4  0  0  0  0  0  0  0  0  0  4  0  0  0  0  0  0  0  0  0  0  4  4  4  4  4  0  4  0  4  4  4  0  4  0  4  4  4  4  0  0  0  0  4  0  4  4  0  0  4  4  0  0  4  0  4  4  0  4  0  0  4  4  0  4  4  0  0  4  4  0  0  0  4  4  4  0  0  0  0  0  0  0  0  0  0  0  0  0  0
 0  0  0  4  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  4  4  4  4  0  4  0  0  0  0  4  4  4  4  0  4  0  4  4  4  0  0  0  0  4  4  0  0  4  4  0  0  0  4  4  0  4  4  0  0  0  0  0  4  4  4  4  4  4  0  4  4  0  4  0  4  4  4  4  4  4  4  4  0  4  0  0  0  0  0  0  0  0
 0  0  0  0  4  0  0  0  0  0  0  0  0  0  0  0  0  0  4  0  4  4  4  4  0  0  4  0  4  4  0  0  4  0  0  4  4  0  4  0  4  0  4  4  0  4  4  0  4  4  0  4  4  0  4  0  4  0  0  4  4  4  4  4  0  0  0  0  0  0  4  0  0  4  0  0  0  4  4  4  4  0  0  4  0  0  0  0  0  0  0  0
 0  0  0  0  0  4  0  0  0  0  0  0  0  4  0  0  0  4  4  0  0  4  0  4  4  4  0  4  4  4  4  4  4  0  4  4  4  4  0  0  0  0  4  4  4  0  0  0  4  4  4  0  0  0  4  0  0  4  0  0  0  4  4  4  4  0  0  0  4  4  4  4  0  0  0  4  0  4  4  0  4  0  4  4  0  0  0  0  0  0  0  0
 0  0  0  0  0  0  4  0  0  0  0  0  4  0  0  0  4  4  4  4  0  4  4  4  4  0  0  0  4  0  4  0  4  4  0  0  0  4  0  0  0  4  0  4  0  4  4  0  4  4  0  0  0  4  0  4  4  0  4  4  4  0  0  0  4  0  4  0  0  4  0  0  0  0  4  4  4  4  4  0  0  4  4  4  0  0  0  0  0  0  0  0
 0  0  0  0  0  0  0  4  0  0  0  0  0  4  0  4  4  0  0  4  0  4  4  0  4  0  4  4  4  0  0  0  0  0  4  4  4  0  4  0  4  4  0  4  4  0  0  4  0  0  4  0  0  0  0  4  4  4  0  4  0  0  4  0  0  0  4  0  4  4  4  0  4  4  0  0  4  0  4  0  0  4  0  4  0  0  0  0  0  0  0  0
 0  0  0  0  0  0  0  0  4  0  0  0  4  0  4  4  0  4  4  4  4  4  4  0  0  0  4  0  0  0  0  0  0  4  4  4  4  4  0  0  0  0  4  0  0  0  0  4  4  4  4  0  0  0  4  4  0  4  0  4  4  0  4  4  0  0  0  4  4  0  4  4  0  4  0  0  4  4  0  0  4  0  0  0  0  0  0  0  0  0  0  0
 0  0  0  0  0  0  0  0  0  4  0  0  0  4  4  0  4  4  0  4  4  4  0  4  4  4  4  0  0  4  0  4  0  4  0  0  4  0  4  0  0  0  0  4  0  4  0  0  4  4  4  0  0  4  4  4  4  4  4  0  0  4  4  0  4  4  4  0  0  0  4  4  0  0  0  0  4  0  4  0  0  0  4  0  0  0  0  0  0  0  0  0
 0  0  0  0  0  0  0  0  0  0  4  0  4  0  4  0  0  4  4  0  4  0  0  4  4  4  0  0  0  0  4  0  4  0  0  4  4  4  4  4  0  0  0  0  4  4  4  0  0  0  0  4  0  4  4  0  4  0  4  4  0  4  0  0  0  4  4  4  0  0  0  4  0  4  0  4  0  4  0  4  4  4  4  4  4  4  0  0  0  0  0  0
 0  0  0  0  0  0  0  0  0  0  0  4  0  4  4  4  0  4  0  0  0  4  4  4  0  0  4  0  0  4  4  4  0  4  4  4  4  4  4  4  4  4  4  0  0  4  4  0  0  0  0  0  4  4  4  0  4  4  4  4  4  0  0  4  4  0  0  4  0  4  4  0  4  4  4  4  4  4  4  4  4  4  0  4  4  4  0  0  0  0  0  0

generates a code of length 92 over Z8 who´s minimum homogenous weight is 68.

Homogenous weight enumerator: w(x)=1x^0+67x^68+6x^70+237x^72+50x^74+392x^76+150x^78+649x^80+410x^82+16x^83+1204x^84+144x^85+1332x^86+576x^87+2684x^88+1344x^89+3088x^90+2016x^91+4041x^92+2016x^93+3146x^94+1344x^95+2706x^96+576x^97+1290x^98+144x^99+1135x^100+16x^101+450x^102+593x^104+226x^106+349x^108+68x^110+167x^112+24x^114+70x^116+34x^120+5x^124+1x^128+1x^140

The gray image is a code over GF(2) with n=368, k=15 and d=136.
This code was found by Heurico 1.16 in 99.3 seconds.