The Mega Millions lottery jackpot has reached a record $1.6 billion ahead of Tuesday night's drawing. The semi-weekly prize has been ballooning since July 24, and had reached $1 billion ahead of Friday night's drawing, when, again, nobody picked all six winning numbers. It is likely someone will win on Tuesday, as 75 percent of the 302 million possible combinations will be chosen by then, based on sales projections.