The generator matrix

 1  0  1  1  1  1  1  1  1  1  1  0  1  1  1  1  1  1  1  1  1  1  1  1  7  1  1  1  1  1  1  1  1  7  1  1  1  1  1 28  1  1 28  1  1  1  1  1  1  1  1  1  1  1  1 21 21 42  1  1  1  1 42  1  1 42  1 14  1  1  1  1  1  1  1  1
 0  1  1 31 16 48  4 19  0 36 31  1 16 19 48  4 36  7 38 26  9  9  6 46  1 30  7 38 46 14 43  6 26  1 22  3 13 32  5  1 43  2  1 14 17 22 30 20 21 20 39 39 32 28 34  1  1  1 13 28 21 20  1  6 14  1 48  1 21  5 12 12 19 12 40  5
 0  0 35 21 42  7 14 21  7 28 14  7 35  0  0 28 42 14 42 28  7 21 35  7 35  0 28 35  0 42 21 28 35 42 14  7 42 35 14 28  0 14 14 21  0  7 28 28  0 14 14  7  0 21 21 42 28 21 14 28 14  7 35 42 35 14 21  0 42 21  0 28  7 42 35  7

generates a code of length 76 over Z49 who´s minimum homogenous weight is 447.

Homogenous weight enumerator: w(x)=1x^0+2520x^447+762x^448+1764x^449+1050x^450+2688x^454+612x^455+588x^456+252x^457+1176x^461+960x^462+1764x^463+756x^464+1848x^468+24x^469+12x^476+24x^483+6x^490

The gray image is a code over GF(7) with n=532, k=5 and d=447.
This code was found by Heurico 1.16 in 46 seconds.