From my memory recall, I thought that the trusted ticket length was 24 characters, but it could have changed since last time I checked. Also, the instructions state that it has two parts (a uuid and a 24 character key), so it could end up being 31 characters. Usually I've seen it in parentheses, and if your IP isn't whitelisted, then you get back a -1.
Thanks for the response. So that means I will use the whole 31 char key I am getting on constructing a URL to view a report right?
Try it out.