To any here who are interested in or good at math, there is a contest going here, where if you can prove or disprove any of 7 theories, you win a million dollars (for a maximum prize of $7 million). Me and a friend of mine will be trying to win... so you'd better hurry if you want to compete with us. 
PS. Yes they are hard, noone has proven/disproven them yet, and some of them have been around for almost 200 years. (I think the oldest one was originally theorized in the 1820's)
PS. Yes they are hard, noone has proven/disproven them yet, and some of them have been around for almost 200 years. (I think the oldest one was originally theorized in the 1820's)