Junior member wishes to be senior member..

[Brandon Martus]

It's in the FAQ:

0-50 posts: Junior Member
50-100 posts: Frequent Contributor
100-150 posts: Senior Member
150+ Post-A-Holic (or custom).

There are other factors which contribute to the levels, besides number of posts. How long you have been a member, and any rule violations both play a part.

in other words:

Add up all your posts, subtract the chit-chat, subtract a few points for every time I've had to erase/edit your post or warn you about something. Thats the 'undocumented number' I've spoke of in the past.