Here are the Mega Millions winning numbers from Tuesday night

The winning numbers for the estimated $636 million Mega Millions drawing for Tuesday, December 17 are:

8, 20, 14, 17, 39

Mega Ball: 7

This is the second-biggest lottery prize in U.S. history.

The jackpot now trails only a $656 million Mega Millions pot in March 2012.

Mega Millions changed its rules in October to help increase the jackpots by lowering the odds of winning the top prize to about 1 in 259 million.

Officials expect about 70 percent of the possible number combinations to be purchased. The cash option is $341 million, before taxes.