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They are the composite numbers, products of primes and their multiples.

All even numbers are composite, except the number two (2) which is prime.

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Q: What are all the numbers that are not prime numbers called?
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Related questions

What is it called when all the prime numbers that make a given number called?

i think prime numbers


Can all whole numbers be written as prime numbers times together?

Yes, this is called their prime factorization.


What are the all prime numbers?

2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97 these are all the prime numbers


What is 1 called if not a prime number?

It is called a "unit". Note: by definition, 1 can not be prime because all prime numbers are divisible by exactly 1 AND itself, with the AND inferring that there is a second factor. therefore all prime numbers have exactly 2 factors, 1 AND itself. 1 is the multiplicative identity


What do 3 5 7 11 and 13 have in common?

They are all odd, and they are all prime numbers


What is a chart of prime numbers called?

The Sieve of Erastosthenes shows prime numbers.


What is the term for numbers whose GCF is 1?

A set of numbers whose GCF is one are called co-prime or relatively prime


What is a mersume prime number?

Let p = any prime number. (2p -1) is called a Mersenne number. Any such number that is prime is called a Mersenne Prime. Father Mersenne wrote a list of numbers of this type which he thought were prime, but a few were not. In fact, most of the large Mersenne numbers are not prime, but all the really large numbers that have been proved to be prime are Mersenne Primes.


What are numbers that only have two factors called?

They are called prime numbers.


When the hcf of two numbers is 1 it is called what?

The numbers are relatively prime or co-prime.


Are all multiples of a prime number are prime numbers?

No, multiples of prime numbers are composite.


What are numbers that have no prime numbers?

Well, when you think about it, all numbers that are even numbers are prime numbers... except 2 ISN'T a prime number!