The generator matrix

 1  0  1  1  1  1  1  1  1  1  1  1  1  1  1  0  1  1  1  1  1  1  1  1  0  1  1  1  1  1  1  1  1  1  3  1  1  1  1  1  1  1  1  1  1  1  1  1  1 3a+3  1  1  1  1  1  1  1  1  3  1
 0  1  1  a 7a+7 8a+4 3a+5 8a+5 8a a+5  0 a+5 8a 8a+5 8a+4  1  a 7a+7 3a+7 3a+5 a+5 8a+5 7a+7 8a+4  1  a 3a+7 3a+5 8a a+7 a+8  0 2a+5 6a+5  1 a+3 3a+7  3 a+3 8a+3 8a+7 3a a+7 a+8 a+3 a+7  5 8a+3 6a+7  1 6a+2 8a+7 8a+3 a+8 3a+5 4a+8 6a+8 5a+1  1  0
 0  0 3a+6  0 3a+6  3 6a+6 6a+6  6 3a 3a+6 3a  3 3a  3  3 6a+6  6 3a+6 3a+3 6a+6  6  0 3a  6  6  3 6a+6 3a  3  6 6a+3 3a 6a+3 6a 6a  6 6a 6a 6a+3 3a+6  3 6a+3 3a+3 3a  6  3 6a+3 6a+6  6 3a+6 3a  3 3a+6 6a+3  3 6a 3a+3 3a+3  6
 0  0  0  3 3a+6 3a+6  3 3a  3 3a+3 6a 6a+6 6a 6a+3  0 6a+6 3a+3 3a+6 3a 3a+3 6a 3a 6a+6  6  0 3a+3 3a 6a+6  3  6 6a  6  0  3 3a 3a  6  6  0 3a+3  3  0 6a+6 3a 6a+6  3 3a+3 3a+6  6 6a 6a+6 3a+3  3 3a+6 6a 3a  6  0 3a+3  6

generates a code of length 60 over GR(81,9) who´s minimum homogenous weight is 450.

Homogenous weight enumerator: w(x)=1x^0+656x^450+72x^451+216x^452+288x^457+648x^458+9136x^459+2016x^460+2952x^461+3024x^466+4536x^467+35152x^468+7128x^469+7992x^470+16416x^475+18144x^476+118528x^477+20232x^478+20952x^479+32760x^484+29160x^485+156024x^486+23040x^487+20376x^488+608x^495+680x^504+344x^513+240x^522+88x^531+32x^540

The gray image is a code over GF(9) with n=540, k=6 and d=450.
This code was found by Heurico 1.16 in 34.4 seconds.