The odds of winning the Mega Millions jackpot are 1 in 302.6 million, making them the highest odds of any other state or multi-state lottery game ever played in the United States. However, this means the jackpot can grow to surpass the billion-dollar mark with relative ease. The overall odds of winning any prize are 1 in 24, which is slightly better than that of Powerball, which are 1 in 24.87.
Prizes must be claimed in the jurisdiction where the winning ticket was purchased. Players can generally claim a prize up to $600 at any licensed lottery retailer in the jurisdiction where they bought the ticket. Prizes over $600 can be claimed at some lottery offices, depending on the amount, and also at lottery headquarters. Please contact your lottery with any further questions.
Jump up ^ "NEW YORK STATE GAMING COMMISSION AMENDMENT OF SECTIONS 5004.9, 5007.2, 5007.13, 5007.15, 5007.16, 5009.2 and 5010.2 OF NEW YORK CODES, RULES AND REGULATIONS TITLE 9, SUBTITLE T, CHAPTER III, SUBCHAPTER A" (PDF). New York State Gaming Commission. New York State Gaming Commission. p. 4. Archived from the original (PDF) on August 24, 2015. Retrieved 2015-08-02.
Note: As indicated in the instructions, for the purposes of eligibility some countries include components and dependent areas overseas.  If you are a native of a dependency or overseas territory, please select the appropriate country of eligibility.  For example, natives of Macau S.A.R should select Portugal, and natives of Martinique should select France.
Some lotteries sell Powerball® tickets over the Internet, but the service is only available to residents of that jurisdiction. The sale of Powerball tickets over the Internet or by mail across jurisdictional borders is restricted. Lotteries may refuse to pay out prize money on Powerball tickets purchased on any website other than their own. Please contact your lottery with any further questions.
The only way to be sure that what you are buying is “official” is to purchase your tickets from a company that has agents that will purchase in the real world the Powerball tickets online that you have selected. If you are a more trustworthy person and don’t need a scanned copy of your Powerball tickets online then by all means go for an online lottery ticket provider that follows the insurance model. 
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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