Numbers with exactly three factors are squares of prime numbers.
4, 9 and 25.
Numbers with three factors are squares of primes. So: 4, 9, 25
All numbers that are the square of primes have exactly 3 factors.
4, 9, 25, 49
8 10 12 and 13
4 and 9
Numbers with exactly three factors are squares of prime numbers.
Squares of prime numbers have exactly three factors.
4, 9 and 25.
2 4 6
Squares of prime numbers, like 4, 9 and 25.
4 (factors 1, 2 and 4) and 9 (factors 1, 3 and 9) are two examples.
Numbers with three factors are squares of primes. So: 4, 9, 25
Oh, dude, 3 is a prime number because it can only be divided by 1 and itself. It's like the loner of the number world, only hanging out with 1 and 3. So yeah, 3 is definitely a prime number, no need to worry about it being a composite one.
All numbers that are the square of primes have exactly 3 factors.
All numbers that have exactly two factors are prime numbers whereas composite numbers have more than two factors.