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  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1
 0  7  0  0  7  7 28 14 21  0  7 21 21 21 35 14 14  7 28 14 21 28  0  0 28  7  7 21  0 28 42 28  0 42 28 21 21 42  7 14 14 21  0 28 35 21 14  7 28 14  7 14 42 42 42 14 35  0  0 42 28 35  7 42 35 42 14  0  7 28 28 21  7 14 42 42  7  0 14 42 21  0 21 21 14  7 42 28  7
 0  0  7  0 35 28 21 35 42 21 21 21 35 35 28  0  0 21  7 28 14  7  7 35  0  7  7  7 35  0 35 14 28 28 21 28 14  7 28  7 28 21  0 14 14 14 42  0 14 35 35 42  0 42 14 28 14 35 42 42 42 35  0 28 35  0 14 21 14 21  7 35 42 14  7 14  7 28  0  0 42 35 42  0  7 28 35 14 28
 0  0  0  7 35  7 14 42 42 28  7  0 14 42 42 35  7 14 35  7  7 21 14 28 35 35 14  0 35 28 14 28 21 42  7 21 14 42 14 42 35 21 14 21  7 42 35 35 42 21 42 42  0 28 14 21 21 21  7 21 14 21 28 35 35 21 14  0 42 35 14 28 42  0 21  0  0  7  0 42  0  0  7 14  0  0 42  7 28

generates a code of length 89 over Z49 who´s minimum homogenous weight is 511.

Homogenous weight enumerator: w(x)=1x^0+228x^511+558x^518+456x^525+270x^532+14406x^534+222x^539+222x^546+114x^553+90x^560+78x^567+54x^574+30x^581+24x^588+30x^595+12x^602+6x^609+6x^623

The gray image is a code over GF(7) with n=623, k=5 and d=511.
This code was found by Heurico 1.16 in 0.528 seconds.