On October 13, 2009, the Mega Millions consortium and Multi-State Lottery Association (MUSL) reached an agreement in principle to cross-sell Mega Millions and Powerball in American lottery jurisdictions, with the two groups referred to as the "Mega Power Lottery"[7] by many users. The expansion occurred on January 31, 2010, as 23 Powerball members began selling Mega Millions tickets for their first drawing on February 2, 2010; likewise, 10 Mega Millions members began selling Powerball tickets for their first drawing the next day. Montana (joining Mega Millions on March 1, 2010) was the first jurisdiction to add either game after the cross-sell expansion. Nebraska (March 20, 2010), Oregon (March 28, 2010), Arizona (April 18, 2010), Maine (May 9, 2010), Colorado and South Dakota (the latter two on May 16, 2010) also have joined Mega Millions since the expansion.

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.
Drawings are usually held at the studios of WSB-TV in Atlanta, Georgia.[1][38] The original host was WSB's chief meteorologist, Glenn Burns. Currently, most drawings are emceed by the full-time host of Georgia Lottery drawings, John Crow, with Brian Hooker the main substitute host. For larger jackpots, the drawing sometimes is moved to Times Square, with New York Lottery announcer Yolanda Vega co-hosting.
MUSL officials initially suspected fraud or a reporting error. However, all 110 winners had played numbers from fortune cookies made by Wonton Food Inc. of Long Island City, New York. The factory had printed the numbers "22, 28, 32, 33, 39, 40" on thousands of fortunes. The "40" in the fortune did not match the Powerball number, 42. None of the employees of Wonton Food played those numbers; at the time, the closest game member was Connecticut.[40] Since the ticket holders had won as result of a coincidence rather than foul play, the payouts were made.[41]
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.
If you are married, unless you are legally separated (i.e., there is a written agreement recognized by a court or a court order), you need to include your spouse as well even if he/she does reside with you and/or will not immigrate with you. Of course, if you are legally divorced or widowed, you no longer have a spouse and you don't have to enter the former spouse information.
In Georgia, New Jersey, and Texas, players must choose, in advance, whether they wish to collect a jackpot prize in cash or annuity. Georgia and New Jersey winners can change an annuity ticket to cash should they be eligible for a jackpot share; however, the choice is binding in Texas. The other Mega Millions members allow the cash/annuity choice to be made after winning (usually 60 days after claiming the ticket), although in Florida the 60-day "clock" starts with the drawing in which the jackpot prize was won.
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 advantages to group game tickets is that is a good way to maximize your exposure (you have a little bit of a lot of tickets) without spending fortunes of multiple tickets. Due to the US Powerball having a minimum jackpot of $40m, group game tickets are always an attractive option as even with only a 2.5% share of the syndicate, you will still win $1m! As the jackpots grow, the Syndicate option becomes more and more appealing. The mantra of the group game player is “it’s better to have a little bit of something than a big bit of nothing.”