mathjs/docs/reference/functions/isPrime.md

Function isPrime

Test whether a value is prime: has no divisors other than itself and one. The function supports type number, bignumber.

The function is evaluated element-wise in case of Array or Matrix input.

Syntax

math.isPrime(x)

Parameters

Parameter	Type	Description
x	number | BigNumber | Array | Matrix	Value to be tested

Returns

Type	Description
boolean	Returns true when x is larger than zero. Throws an error in case of an unknown data type.

Examples

math.isPrime(3);                     // returns true
math.isPrime(-2);                    // returns false
math.isPrime(0);                     // returns false
math.isPrime(-0);                    // returns false
math.isPrime(0.5);                   // returns false
math.isPrime('2');                   // returns true
math.isPrime([2, 17, 100]);           // returns [true, true, false]

See also

isNumeric, isZero, isNegative, isInteger