Unclaimed prizes are kept by the lottery jurisdiction. If a Grand Prize goes unclaimed, the money must be returned to all lotteries in proportion to their sales for the draw run. The lotteries then distribute the money, based on their own jurisdiction's laws, to other lottery games or to their jurisdiction's general fund, or otherwise as required by law.
Drawings for Powerball are held every Wednesday and Saturday evening at 10:59 p.m. Eastern Time. Since October 7, 2015, the game has used a 5/69 (white balls) + 1/26 (Powerballs) matrix from which winning numbers are chosen, resulting in odds of 1 in 292,201,338 of winning a jackpot per play.[1] Each play costs $2, or $3 with the Power Play option. (Originally, Powerball plays cost $1; when PowerPlay began, such games were $2.) The official cutoff for ticket sales is 10:00 p.m. Eastern Time; some lotteries cut off sales earlier.[2] The drawings are usually held at the Florida Lottery’s studio in Tallahassee.
Jackpot winners have the choice of receiving their prize either in one single lump sum payment, or once a year with the annuity option (30 payments over 29 years). They have 60 days to decide which way they want to be paid. During these 60 days, a player who originally opted for the annuity payment is able to instead take the lump sum payment option. If they do not make a choice either way, after 60 days, the player will automatically receive their prize as an annuity.

The New Jersey Lottery, among others, in early 2009 announced it would seek permission to sell Powerball tickets alongside Mega Millions. In October 2009, an agreement between Mega Millions and MUSL allowed all U.S. lotteries, including New Jersey's, to offer both games. On January 31, 2010, Mega Millions expanded to include the 23 MUSL members; as of that date, 35 jurisdictions were participating in Mega Millions. On the same day, 10 existing Mega Millions-participating lotteries began selling Powerball tickets. Ohio joined Powerball on April 16, 2010. On March 1, 2010, Montana became the first MUSL member to add Mega Millions after the cross-sell expansion. Nebraska became the 37th Mega Millions participating member on March 20, 2010, followed by Oregon as the 38th member on March 28, Arizona as the 39th member on April 18, and Maine as 40th Mega Millions participant on May 9, 2010. Colorado and South Dakota added Mega Millions on May 16, 2010, bringing the total to 42 jurisdictions.

The structure of the draw is one which regular lottery players will be very familiar with; players must pick 5 regular numbers from a pool with a total of 69 numbers and in addition to these regular number picks, you also choose one bonus ball (known as the Powerball) from a pool of 26. These two pools of numbers are mutually exclusive and remain completely separate throughout the drawing procedure. In order to jackpot the US Powerball, you need to match all 5 regular numbers and the Powerball. Do this and you are instant Powerball millionaire – it’s as simple as that!
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