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Is 81 a Prime Number?
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Is 81 a Prime Number?

Nope. Eighty one isn't prime. And there's nothing you can do to change it. Seriously, just give up. Happy? Hurry up and finish your assigment so you can play videogames.
What are the factors of 81?
What is the prime factorization of 81?

...81...

Or try another number: