Ding ding ding!! *clak clak clak clak clak clak clak*
Took me about 2 sittings of 2 hours each, using the rubber band "technique".
Once I entered Super Victory Mode, I manually entered the inputs and got like 4 Jackpots in a row. Took me about 3500 turns in total to get the fragment, I was really really lucky.
That's probably the worst "mini-game" I've ever witnessed in a video game. Only based on luck and nothing else.