JAPAN | A Nice Olympiads Trick | No Calculator Allowed | 2^22 - 1|

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[@RyanLewis-Johnson-wq6xs]

I did it in my head

[@grahamgleed9040]

It's easier to do 2x2 22 times than it it is to do 2049x2047

[@VinniusHKruger]

= 2^22

[@RyanLewis-Johnson-wq6xs]

Input
2^22 - 1 = 4194303
Result
True