Those are called prime numbers. There are infinitely many prime numbers. The sequence of prime numbers starts with 2, 3, 5, 7, 11, 13, 17, 19, 23 ...
prime numbers
"Prime" numbers
They are prime numbers.
That is the definition of prime numbers.
Those are the prime numbers.
These are the prime numbers.
Prime numbers. They are divisible evenly (no remainder) by one and themselves only.
Natural numbers that are greater than zero that have no other factors except one and themselves are called prime numbers. The first five prime numbers are 1, 3, 5, 7, and 11.
prime numbers
Those are called prime numbers.
That describes prime numbers.
If the number 1 is considered a factor, then these are the prime numbers. Their only factors are 1 and themselves.