Even though I didn't really want anyone to guess more than once, I never did say that you could only guess one time. So I'll accept this, but yes! 31 is the correct answer!
Well, even though I'm against that I never said you couldn't. The next time I do this I'll ensure I put some rules in place so this doesn't happen again. So let me apologize, and a lesson learned. I want all these giveaways to be fair, and I want everyone to have a chance.