What is the highest leverage you can find on an exchange?

Me and my friend like gambling small ammounts for entertainment, think cents and pennies, we tried everything and eventually got bored of it all, this is the last fun thing to do with spare change, so is there like a gagilion X leverage on any platform?

I found a 500x one and a 1000x one but both seem shady websites so i'm asking you guys what legit platform provides the most leverage, i know most platforms provide 100-125x but more zeroes means more dopamine XD

P.S. yes i know the risks i wouldn't do this with money i couldn't afford to lose