Squares of prime numbers have exactly three factors.
Numbers with exactly three factors are squares of prime numbers.
The squares of all prime numbers above 2 have exactly 3 factors.
By definition, a prime number has exactly two factors. So, there are no prime numbers with exactly three factors.
A number has exactly three factors if and only if it is the square of a prime number.
Prime numbers have exactly two factors. 3 has exactly two factors: 1 and 3. So 3 is prime. Composite numbers have more than two factors. 4 is composite because it has three factors: 1, 2, and 4.
2 and 3
Squares of prime numbers.
3, 5 and 7
Prime squares have three factors. 4, 9, 25
25 and 49
That's an infinite list.
4 and 9
All numbers that have exactly two factors are prime numbers whereas composite numbers have more than two factors.
Numbers with three factors are squares of primes. So: 4, 9, 25
Squares of prime numbers, like 4, 9 and 25.
Prime numbers have exactly two factors.All prime numbers have only 2 factors whereas composite numbers have more than 2 factors
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.
2 4 6
The squares of all prime numbers have exactly 3 factors. The numbers under fifty that are the squares of primes are 4 (1, 2, and 4), 9 (1, 3, and 9), 25 (1, 5, and 25), and 49 ( 1, 7, and 49).
4, 9, 25 and 49 They are squares of prime numbers.
Prime numbers are the numbers that have exactly two factors.Prime numbers have only two factors, the number one and themselves.