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It is called the prime factorisation (or prime decomposition) of the composite number.

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The prime factorization

Q: What is it called when you write a composite number as a product of its primes?

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It is the product of two primes and so is a composite.

Assuming you are referring to the prime factors of the number, the product of the prime factors of any composite number is equal to the number itself.

Writing a number as the product of its prime factors is called prime factorization.

Sure. All composite numbers can be written as a product of primes. It shouldn't be tough to find a composite number that's the sum of three other composite numbers. Let's try 30. 2 x 3 x 5 = 30 Product of primes, check. 6 (2 x 3) + 10 (2 x 5) + 14 (2 x 7) = 30 Sum of three products of primes, check.

Factor tree.

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A composite number. The product of two primes is sometimes called a semiprime.

Product of two prime numbers is a composite number. e.g. 2 x 3 = 6, 3 x 17 = 51 etc. But, why the result is a composite number? Definition of composite number makes it much clear: A number which can be expressed as the product of prime numbers is called a composite number. Also, it has more than two factors. So, product of two primes is a composite number.

Expressing 15 as a product of its primes is 3 x 5 = 15 Composite numbers can be broken down into a product of prime numbers.

A composite number is basically one that is NOT a prime - a composite number is a product of two or more primes.

It is the product of two primes and so is a composite.

That's known as a prime factorization.

Assuming you are referring to the prime factors of the number, the product of the prime factors of any composite number is equal to the number itself.

That's a prime factorization.

The number 39 is a composite number. 39 = 3 x 13. Because 39 can be written as a product of primes (3 and 13), it is, by definition composite.

The only factors or divisors or 3 are 1 and the number 3 itself. The definition of a prime is a number whose only factors are 1 and itself so 3 fits this definition.Any composite number can be broken down into a product of primes. If you try, you will see there is not product of primes that equals 3.

7 is a factor of 77 so it cannot be a prime. So it has to be composite.It is composite since 7 x 11 is 77 and those are both primes. That is to say, it is the product of two primes and that makes it composite.

Writing a number as the product of its prime factors is called prime factorization.