The block in which the above post is included has a merkle root of 0dc64e7c19e5824c1c4762d59adce7e91c459f89.
To find the winner we:

1. Convert the merkle root into base 10:
   0dc64e7c19e5824c1c4762d59adce7e91c459f89 = 78639264557757531311230927643165230661567356809.
2. Compute the residual after dividing by the number of tickets: 78639264557757531311230927643165230661567356809 mod 557 = 283.
3. This is the winning ticket, held by @havok777.

Congratulations!