2873 is a composite number, not a prime. Its factors are 1, 13, 17, 169, 221, and 2873, and its prime factorization is 13x13x17.
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11 is a prime number.
5 is a prime number. It is only evenly divisible by itself and one.5 is a prime number, so the only prime factor of 5 is itself.5 is already a prime number; it has no factorization.
No. It is an even number. The only even number that is prime is the number 2.
53 is a prime number so there is no relevant prime factorization for it.
A number that can only be divided by one and itself is called a prime number. Prime numbers are integers greater than one that have no positive divisors other than one and themselves. Examples of prime numbers include 2, 3, 5, 7, 11, and so on.