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# Which is lowest prime number

Updated: 10/18/2022 Wiki User

11y ago

All numbers that only have one and itself as factors are prime. Therefore, to tell if a number is prime simply find it's factors. If it has more than two factors than it is not a Prime number. Wiki User

11y ago   Wiki User

14y ago

A prime number is any number that can be divided only by 1 and itself. The mathematician Euclid proved that there are an infinite number of primes. All the primes less than 10 are:

2, 3, 5, and 7. None of these numbers can be divided by any other number other than 1 and itself.   Wiki User

14y ago

There is no square number that is prime. Prime numbers have no factors other than themselves and 1. (1 is defined to be not-prime) Proof: Suppose that there exists a square number A that is prime. Then A cannot be written as a product of any integers but itself and 1. But A is a square number. That means that there exists some integer n, such that A = n² Hence we are able to write A as A = n*n This is a contradiction since we assumed A was only able to be written as a product of itself and 1. Hence our assumption is false. Therefore, there exists no square number that is prime.   Wiki User

11y ago

All numbers that only have one and itself as factors are prime. Therefore, to tell if a number is prime simply find it's factors. If it has more than two factors than it is not a prime number.   Wiki User

9y ago

Prime numbers have two factors: 1 and the number itself.

Composite numbers have more factors than 1 and the number itself, so composite numbers have 3 or more factors.

For example,

The factors of 17 are 1 and 17. It is prime.

The factors of 4 are 1, 2, and 4. It is composite.   Wiki User

13y ago

That is easy. Almost everyone knows that. It is 2.   Wiki User

15y ago

The only prime number that is even is the number two.   Wiki User

11y ago

2

Do not answer 1, because 1 is either prime nor composite.   Wiki User

11y ago

The lowest prime number is 2. Although 1 is also a prime, it's considered to be a 'special' number.   Wiki User

7y ago

The one with more than two factors.   Earn +20 pts  