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The product of any two numbers, neither of which is 1, is never a Prime number.

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Q: When is the product of two prime numbers not a prime number?
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Related questions

When is product of 2 prime numbers a prime number?

The product of two prime numbers is always a composite number, and it never is a prime number.


What is a product of a prime number?

A composite number is the product of two or more prime numbers.


Could the product of two prime numbers be a prime number?

No.


Is the product of two prime numbers not a prime number?

The product of two prime numbers can never be another prime number, the numbers that you multiplied are factors of the product. (example, 9 times 5 is 45, 9 and 5 go into 45)


Is the product of 2 numbers a prime number?

The product of two numbers could be either a composite number or a prime number. If one of those numbers is 1 and the other is a prime number, the result is that prime number. If neither number is 1, the product of the two numbers will be a composite number. If one of those numbers is 1 and the other is not a prime number, the product will not be a prime number. So, in most cases, it will be a composite number.


Is a product of two prime numbers a prime number?

No - because its factors include each of the two prime numbers.


When is the product of two numbers a prime number?

When one of the numbers is prime and the other is 1.


Can each of the whole numbers between 1 and 50 be written as a product of two or more prime numbers?

Every composite number ... that is, one that is not a prime ... can be written as the product of two or more prime numbers. The primes themselves are the exceptions. A prime number is the product of only ' 1 ' and itself, and ' 1 ' is not considered a prime number.


What number can be written as the product of two prime numbers?

A semiprime or a prime square.


Can every prime number be expressed as the product of two prime numbers?

None of them can.


Is 15 a number that is a product of exactly three different prime numbers?

No. 15 is the product of two prime numbers: 3 and 5


Is the product of two prime numbers composite or prime?

The product of two prime numbers will be composite.