Mega Millions holds the record for the second-largest lottery jackpot in US history — $1.58 billion in August 2023, won by a single ticket in Neptune Beach, Florida. But the game's roots go back to 1996, when it launched under a different name across just six states. The path from "The Big Game" to a 47-state powerhouse with jackpots exceeding a billion dollars is a story of deliberate design, strategic expansion, and one watershed format change in 2017 that changed everything.
The Big Game: 1996–2002
Mega Millions launched as The Big Game on August 31, 1996, with six founding member states: Georgia, Illinois, Maryland, Massachusetts, Michigan, and Virginia. The original format was 5/50 + 1/25 — five numbers from a pool of 1–50, plus one bonus ball from 1–25. Jackpot odds were approximately 1 in 52.9 million. Tickets cost $1.
The game drew immediately on the success of multi-state lottery structures pioneered by Powerball but positioned itself as a competitor with its own jackpot-focused branding. The Big Game's first jackpot above $100 million came in May 2000 when two tickets split a $363 million prize — at that point, the largest lottery jackpot ever paid out in the US.
Rebranding as Mega Millions: 2002
In May 2002, The Big Game rebranded as Mega Millions and expanded to New York, Ohio, New Jersey, and Texas — doubling the number of participating states nearly overnight. The format also changed: the main ball pool expanded from 50 to 52 numbers. Draw days shifted to Tuesday and Friday, which remain the current draw days.
The 2002 expansion was a turning point. More states meant more ticket sales, larger jackpots, and faster growth cycles. Within three years, California joined in 2005, adding roughly 30 million more potential players and transforming Mega Millions into the first true coast-to-coast lottery game.
The Cross-Selling Agreement with Powerball: 2010
In January 2010, Mega Millions and Powerball reached a landmark agreement: retailers in states belonging to either game could now sell both. Prior to 2010, most states played either Powerball or Mega Millions — not both. The cross-selling deal meant players in every participating state could buy tickets for both games, and lottery retailers saw dramatic sales increases.
This agreement also ended the de facto geographic monopoly each game held. Powerball's traditional strength in the South and Midwest, and Mega Millions' strength in the Northeast and Midwest, collapsed into a single national market for both games.
The 2017 Format Change: 5/70 + 1/25
The most significant change in Mega Millions history came on October 28, 2017. The main ball pool expanded from 75 to 70 numbers. The Mega Ball pool shrank from 15 to 25 numbers. The ticket price doubled from $1 to $2.
This was the same strategic playbook Powerball used in 2015: harder jackpot odds, longer rollover streaks, bigger jackpots. The jackpot odds moved to 1 in 302.5 million — slightly longer than Powerball's 1 in 292.2 million, making Mega Millions the hardest-to-win major US lottery. Odds of winning any prize remain roughly 1 in 24.
The format change also introduced the Megaplier option (an additional $1) which multiplies non-jackpot prizes by 2x to 5x, selected randomly at each drawing.
The Record Jackpots Era: 2018–2023
The 2017 format change delivered exactly what it was designed to produce. Within 12 months, Mega Millions set back-to-back world records. On October 23, 2018, a single ticket in South Carolina won a $1.537 billion jackpot. It was the largest prize ever won by a single ticket at that point.
Five years later, that record fell. On August 8, 2023, a single ticket sold in Neptune Beach, Florida matched all five numbers (13-19-35-54-69) plus the Mega Ball (9) to claim a $1.58 billion jackpot. The cash value was approximately $794.2 million before taxes. It is the largest Mega Millions prize ever paid and the second-largest lottery jackpot in US history.
Mega Millions Record Jackpots Table
| Rank | Jackpot | Date | Winning Location | Winners |
|---|---|---|---|---|
| 1 | $1.58 billion | Aug 8, 2023 | Neptune Beach, FL | 1 |
| 2 | $1.537 billion | Oct 23, 2018 | South Carolina | 1 |
| 3 | $1.35 billion | Jan 13, 2023 | Maine | 1 |
| 4 | $1.05 billion | Jan 22, 2021 | Michigan | 1 |
| 5 | $656 million | Mar 30, 2012 | IL / KS / MD | 3 |
| 6 | $648 million | Dec 17, 2013 | CA / GA | 2 |
| 7 | $543 million | Jul 24, 2018 | San Jose, CA | 1 |
| 8 | $536 million | Jul 8, 2016 | Indiana | 1 |
| 9 | $522 million | Jun 7, 2019 | San Diego, CA | 1 |
| 10 | $516 million | May 21, 2021 | Pennsylvania | 1 |
How Mega Millions Compares to Powerball Today
Mega Millions (1 in 302.5M jackpot odds) is slightly harder to win than Powerball (1 in 292.2M). Both games cost $2 per ticket. Both draw three times a week — Mega Millions on Tuesday, Friday; Powerball on Monday, Wednesday, Saturday. The key structural difference is the Mega Ball pool: 25 options versus Powerball's 26 options. Statistically, Mega Millions jackpots are expected to grow somewhat larger before being won, because the slightly longer odds mean fewer winners per equivalent sales volume.
Both games now participate in a cross-sell arrangement that lets any US lottery retailer carry both, so the choice for most players is largely personal. Some prefer Mega Millions' Tuesday/Friday draws for mid-week excitement; others prefer Powerball's Monday/Wednesday/Saturday cadence.
The Bottom Line
Mega Millions spent its first decade building a player base and establishing the multi-state jackpot model. The 2017 format change transformed it into the billion-dollar machine it is today. Every structural change — harder odds, higher prices, cross-state selling — was designed with one outcome in mind: longer rollover streaks, bigger jackpots, more national headlines. It has worked almost exactly as intended.