- Who
- Jon Heywood, Betway, Microgaming
- What
- 17,879,645 euro(s)
- Where
- United Kingdom (Cardiff)
- When
The largest jackpot payout in an online slot machine game is €17,879,645 ($20,062,600, £13,209,300), won by Jon Heywood (UK), playing Microgaming's Mega Moolah on Betway's website, on 6 October 2015.
- Mega Moolah is a five reel, twenty-five payline online slot game.
- The total progressive jackpot from playing a single round of the game was initially paid in Pound Sterling and was converted in Euros as of 6 October 2015.
