Two identical machines are used for each drawing, randomly selected from four sets. The model of machine used is the Halogen, manufactured by Smartplay International of Edgewater Park, New Jersey. There are eight ball sets (four of each color); one set of each color is randomly selected before a drawing. The balls are mixed by a turntable at the bottom of the machine that propels the balls around the chamber. When the machine selects a ball, the turntable slows to catch it, sends it up the shaft, and then down the rail to the display.
The largest jackpot in Mega Millions history was $656 million annuity value (with a cash option of $474 million) for the March 30, 2012 drawing, in which there were three jackpot-winning tickets; one each in Illinois, Kansas, and Maryland. All three tickets had been claimed by April 18, with each set of winners choosing the cash option of $158 million.
Generally, Powerball players do not have to choose cash or annuity unless they win a jackpot (then they usually have 60 days to choose.) Exceptions include Florida and Missouri; the 60-day "clock" starts with the drawing, so a jackpot winner who wishes to take the cash option needs to make immediate plans to claim their prize. New Jersey and Texas require the cash/annuity choice to be made when playing; in New Jersey, an annuity ticket can be changed to cash after winning, while in Texas, the choice is binding (when the cash option was introduced in 1997, all Powerball players had to make the choice when playing. This regulation was phased out by 1999.) All Powerball prizes must be claimed within a period ranging from 90 days to a year, depending on where the ticket was bought.