Prime numbers to the fourth power, like 16 and 81.
Squares of prime numbers have exactly three factors.
Numbers with exactly three factors are squares of prime numbers.
All numbers that are the square of primes have exactly 3 factors.
3, 5 and 7
Only 16 has exactly 5.
All numbers that have exactly two factors are prime numbers whereas composite numbers have more than two factors.
16, 81, 625
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 are the numbers that have exactly two factors.Prime numbers have only two factors, the number one and themselves.
That is correct -- all prime numbers have exactly two factors.
Take any 5 prime numbers and multiply them together.