As far as we can tell, this is the most lucrative contest in the HISTORY OF THE WORLD. Even if you don't know anything about college basketball you've got to take a shot, right?

This year, for March Madness, you can become a BILLIONAIRE. All you have to do is fill out a PERFECT March Madness bracket. And it's free to enter.

What are the odds of filling out a perfect bracket? If you just picked all 67 games randomly, it would be one in 9.2 quintillion . . . that's a nine with 18 zeroes after it. If you know something about college basketball, the odds are around one in 128 billion.

The billion-dollar prize is being put up by Quicken Loans and Berkshire Hathaway. If you don't know, Berkshire Hathaway is run by WARREN BUFFETT . . . also known as one of the three richest people in the world with a $58.5 billion net worth.

Registration opens up on March 3rd. It's only open to the first 10 million people . . . and they just might get that many signups. If no one gets a perfect bracket, the 20 closest entries will get $100,000 each.

If you do beat spectacular odds and make a perfect bracket, you can choose a $500 million lump sum or the full $1 billion at $25 million a year for 40 years. (Detroit Free Press / Quicken Loans / USA Today)