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Earn +20 ptsQ: Why is 2011 a prime number?
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How 2011 is a prime number?
2011 is a prime number because it has exactly two factors, 1 and itself.
Is 2011 a prime number?
yes it is!
Is 2011 prime?
Yes. To prove it, you can take the square root of 2011 (about 44.8), and divide 2011 by all the prime numbers under this number. You'll see none of them divide, so it's prime.
Why 7 is not a prime number?
7 is a prime number!
Is 109 a prime number or a composite number?
109 is a prime number.
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