One bettor won more than a half-million dollars by hitting an insane parlay during Championship Sunday in the NFL. The lucky winner turned theirR$20 site credit on FanDuel intoR$579,000 by correctly guessing the winners and exact score of both conference championship games. There's 55 555. There's just 55 555.

Oddsmakers will set the lines according to the implied probability of either outcome happening. The sum of the probabilities exceeds 100%, as sportsbooks take a small cut on both sides of a line. Second, sports betting odds dictate how much money a bettor needs to wager to make a certain profit.

What 20-to-1 means: When you see 20-to-1 odds, you're looking at a long shot that is unlikely to win. In fact, the implied win probability for a team that's 20-to-1 is 4.76%. However, should that long shot come in, it would pay out $20 for every $1 wagered.

A Lucky 15 consists of 15 bets of equal value made on four distinct events. The bet includes four singles, six doubles, four trebles and a fourfold accumulator.