I've hit three of them in the last four years, all on 25 cent progressives. The Gold Coast was the most recent, for $1086, then there was the Carnival Fascination cruise to the Bahamas for $1838, and lastly, Circus Circus Reno for $1620. My very first was at the Wild Card in Black Hawk, Colorado, for $935 (it was a three-coin maximum bet machine -- the progressive started at $600) in the late 1990's. I'm due for another! I'll find out next week, gonna spend a couple days in Laughlin at the Edgewater.
Bob