6555 = 3 x 5 x 19 x 23
No. The product of two primes cannot, by definition, be a prime.
(3 x 5) x 7 = 3 x (5 x 7) Of course, the product will no longer be prime.
There are 15 prime numbers less than 50.
By definition, a product of two primes has atwo factors (other than 1 and itself) and so it cannot be prime. So the set is not closed.
No.
No. The product of two primes cannot, by definition, be a prime.
When the numbers are relatively prime.
Here is how you can calculate that: Multiply different prime numbers together, until your product exceeds the number 300. Then, you go back one step.
Because the four smallest prime numbers are 2, 3, 5, and 7. If you multiply these four together you get 210 (which makes 210 the smallest number divisible by four unique prime numbers).
Prime Numbers under 6 are 2,3,5
There are 34 prime numbers under 140.
5 * 17 * 23 =1955
The prime numbers under 16 are 2,3,5,7,11 & 13.
(3 x 5) x 7 = 3 x (5 x 7) Of course, the product will no longer be prime.
All the numbers from 2 to 19 are multiples of prime numbers.
168 prime numbers under 1000.
no, not all prime numbers are closed under addition. why? because, when you add 2 prime numbers you will not always get a prime number. example: 5+3= 8 5 and 3 are prime numbers but their sum is 8 which is a composite number..