Lottery players will have a shot at an estimated $820 million Mega Millions jackpot Tuesday night, less than a week after someone hit a Powerball prize that topped $1 billion.

       The huge Mega Millions jackpot is the eighth-largest U.S. lottery prize and follows a $1.08 billion prize won by a player Wednesday in Los Angeles. California lottery officials haven’t announced a winner of that prize, which was the sixth-largest in U.S. history.

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       Jackpots in the two lottery games grow so large because the steep odds make winning so unlikely, allowing the grand prize to roll over again and again. The last time someone beat Mega Millions’ odds of 1 in 302.5 million and won a jackpot was April 18 — that’s 27 drawings without a big winner.