ISPRIME function

Description

ISPRIME(x) checks whether a number is a prime number. The argument x must be less than 1000000000000 (10¹²). The function returns 1 when the number is prime, 0 when not.

The argument x can be a real number or a matrix. When it is a matrix, the function returns a matrix with the same dimensions and with the ISPRIME function applied to all elements.

Examples

ISPRIME(11) returns 1

Calculator

Related functions

• NEXTPRIME function: returns first prime number larger than x
• PRND function: random prime number function
• PRIMEFACTORS(x) Returns the prime factors of x
• Mathematical functions

External links

• Prime number on Wikipedia.