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Q: Which numbers have exactly 2 factors?

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exactly 2

Prime numbers.

Prime numbers have exactly two factors.All prime numbers have only 2 factors whereas composite numbers have more than 2 factors

Prime numbers

Prime numbers have exactly two factors. 53 and 59 are prime numbers.

The squares of all prime numbers above 2 have exactly 3 factors.

2 and 3

Squares of prime numbers have exactly three factors.

Numbers with exactly three factors are squares of prime numbers.

2 4 6

All numbers that are the square of primes have exactly 3 factors.

Yes.

It is called a prime number

2,3 and 7

All numbers that have exactly two factors are prime numbers whereas composite numbers have more than two factors.

A prime number- the factors are 1 and itself. Composite numbers are numbers with more than 2 numbers.

All prime numbers less than 50 have exactly two factors. e.g. 2,3,5,7,11,13,17,19,23,29,31,37,41,43 & 47.

3, 5 and 7

Prime numbers are the numbers that have exactly two factors.Prime numbers have only two factors, the number one and themselves.

4 (factors 1, 2 and 4) and 9 (factors 1, 3 and 9) are two examples.

That is correct -- all prime numbers have exactly two factors.

No because composite numbers have more than two factors whereas prime numbers have only two factors.

By definition, a prime number has exactly two factors. So, there are no prime numbers with exactly three factors.

1, 2, 3, 5, and 7

Prime numbers have exactly two factors.

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