FILE – A customer fills out a Mega Millions lottery ticket at a convenience store in Northbrook, Ill., on Jan. 6, 2021. The holiday shopping season, for Mega Millions lottery ticket buyers, at least, is ramping up as officials say the estimated jackpot for the drawing the night of Tuesday, Dec. 27, 2022, has surpassed half a billion dollars. (AP Photo/Nam Y. Huh, File)

DES MOINES, Iowa (AP) — A giant Mega Millions jackpot has grown larger to an estimated $640 million after another drawing without a winner. No one won the lottery game’s top prize Tuesday night, making it 21 straight drawings without anyone matching all six numbers. The next drawing will be Friday night. The huge jackpot comes less than two months after the largest lottery prize ever, a $2.04 billion Powerball prize that was won Nov. 8 in California. The reason for all the big prizes is simple. Long odds ensure there are few winners and the long streaks of lottery futility allow jackpots to grow ever larger week after week. The odds of winning a Mega Millions jackpot is one in 302.6 million.