I am a number with exactly two factors. I am divisible only by one and myself. There are infinitely many of me, but I become rarer as numbers grow larger. What am I?

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Accepted Answer

A Prime Number. A prime number is divisible only by 1 and itself. There are infinitely many primes (proved by Euclid around 300 BC) but they become increasingly rare as numbers get larger. Prime numbers are the foundation of modern encryption and internet security.

"I am a number with exactly two factors. I am divisible only by one and myself. There are infinitely many of me, but I become rarer as numbers grow larger. What am I?"

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