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Showing posts with label prime number. Show all posts
Showing posts with label prime number. Show all posts

Saturday, December 31, 2016

Why Isn't 1 a Prime Number

Credit: ValueWalk

A number divisible only by 1 and itself is considered a prime number. 1 seems to conform to the definition; it is divisible by 1 and itself and by no other number. But the definition of prime numbers excludes 1. Why?

Many people think it's because, in the case of 1, 1 and itself are the same number. But this is far from the truth.