# What is a prime number with 3 factors?

## What is a prime number with 3 factors?

As it turns out, the only positive integers with exactly three factors are the squares of primes. For instance, the factors of 9 are 1, 3, and 9, and the factors of 49 are 1, 7, and 49.

### What’s the smallest number with 3 different prime factors?

The smallest number is 30 . Three different prime factors.

#### Is 12 a factor of three different prime numbers?

The numbers 2 and 3 are the only prime factors of 12, but a prime factorization of 12 must list the 2 twice — 2 × 2 × 3 (or 22 × 3), because 2 × 3, by itself, doesn’t make 12.

What are all factors of 3?

Factors of 3 are 1 and 3 only. Note that -1 × -3 = 3. (-1, -3) are also factors, as a product of any two negative numbers gives a positive number.

What is the smallest factor of 3?

3 is the smallest odd prime number and 3 is the only number that is equal to the sum of preceding natural numbers. 3 is the only factor of 3 along with 1….Factors of 3.

1. What Are the Factors of 3?
2. How to Calculate Factors of 3?
3. Factors of 3 by Prime Factorization
4. Factors of 3 in Pairs
5. FAQs on Factors of 3

## How do you tell if it is a prime number?

Every counting number greater than 1 is either a prime number or a composite number. A prime number has exactly two factors — 1 and the number itself. For example, the number 5 is prime because its only two factors are 1 and 5. A composite number has at least three factors.

### What are the prime factors of a number?

If a particular number has prime factors 2, 3, and 7, then there is only one possible value for the number, and that number is the one and only 42. I saw another answer that said the other numbers are 84 and 126.

#### Which is the smallest number with prime factors 2, 3 and 7?

The smallest number (positive integer) which has prime factors 2, 3 and 7 is 2*3*7 = 42. A positive integer N has prime factors 2, 3 and 7 if and only if it is a positive integral multiple of 42; i.e. if and only if there exists a positive integer k such that N = 42*k.

Is there a limit to the number of prime numbers?

For the first 5000 prime numbers, this calculator indicates the index of the prime number. The nth prime number is denoted as Prime [n], so Prime  = 2, Prime  = 3, Prime  = 5, and so on. The limit on the input number to factor is less than 10,000,000,000,000 (less than 10 trillion or a maximum of 13 digits).

How to find all primes between 0 and 200?

Find all primes between 0 and 200. Use the sieve of Eratosthenes again (you need to make a grid in your notebook). This time you need to cross out every 2nd number starting at 4, every 3rd number starting at 6, every 5th number starting at 10, every 7th number starting at 14, every 11th number starting at 22, and every 13th number starting at 26.