prime number
número primo
a whole number greater than 1 whose only factors are 1 and itself.
Example
2, 3, 5, 7, 11, and 13 are prime; 9 is not, because 9 = 3 \times 3.
In Spanish
número primo — un número entero mayor que 1 cuyos únicos factores son 1 y él mismo.
2, 3, 5, 7, 11 y 13 son primos; 9 no lo es, porque 9 = 3 \times 3.