Online gambling is becoming so huge now that hundred-thousand dollar prizes are commonplace. However, every so often a jackpot comes along that is so big even the seasoned grinders stop asking dealers to hit them to look up and say ‘wow'.

Microgaming's Mega Moolah progressive jackpot has topped the $4,000,000 mark for the first time this year. The 5-reel, 25-payline slots game also has a wheel of fortune element, adding to the excitement.

The biggest win to date was when Finnish player Klaus won the jackpot at Mega Moolah playing at Blackjack Ballroom, winding up $5.6m richer.

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