The annuity factor, or the cost to fund an annuity prize, is another key component. The annuity factor is made up of interest rates for securities purchased to fund prize payments. The higher the interest rates, the higher the advertised Grand Prize. You might not realize that an economic reality like interest rates impact even the Powerball jackpot, but they do!
On Jan 31, 2010, the date of the cross-sell expansion, Mega Millions and MUSL each added lotteries; eight Powerball members added Mega Millions by May. The Montana Lottery joined Mega Millions on March 1. Nebraska added Mega Millions on March 20; Oregon followed on March 28; Arizona joined Mega Millions on April 18; Maine added Mega Millions on May 9; Colorado and South Dakota joined Mega Millions on May 16. The U.S. Virgin Islands joined Mega Millions in Oct 2010.
On Oct 4, 2015, the Powerball format changed again; the white-ball pool increased from 59 to 69 while the Powerball pool decreased from 35 to 26. While this improved the chance of winning any prize to 1 in 24, it also lengthened the jackpot odds to 1 in 292,201,338.[19] The 4+1 prize became $50,000; the 10x PowerPlay became available in drawings with a jackpot of under $150 million.[20] Three months later, the format produced a $1.5 billion jackpot, double the previous record, after 20 consecutive rollovers.[19][21]
In spite of the huge popularity of this lottery draw game it is still an unknown to many that you can buy Powerball tickets online, whether you are in the US or not. To be clear, this doesn’t even mean that you have to be a citizen of the US either. No citizenship & not based in the US? You can still play powerball online and buy lottery tickets online for a number of different lottery draw games. 
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