# Python | sympy.is_prime() method

Last Updated : 08 Feb, 2023

In the sympy module, we can test whether a given number n is prime or not using sympy.is_prime() function. For n < 2^64 the answer is definitive; larger n values have a small probability of actually being pseudoprimes.

Note that Negative numbers (e.g. -13) are not considered prime numbers.

```Syntax:  sympy.is_prime()
Parameter:  n; number to be tested
Return:  bool value result ```

Code #1:

## Python3

 `# Python program to check prime number` `# using sympy.is_prime() method`   `# importing sympy module` `from` `sympy ``import` `*`   `# calling isprime function on different numbers` `geek1 ``=` `simplify(``30``).is_prime` `geek2 ``=` `simplify(``13``).is_prime`   `print``(geek1)` `print``(geek2)`

Output:

```False
True```

Code #2:

## Python3

 `# Python program to check prime number` `# using sympy.is_prime() method`   `# importing sympy module` `from` `sympy ``import` `*`   `# calling isprime function on different numbers` `geek1 ``=` `simplify(``2``).is_prime` `geek2 ``=` `simplify(``-``2``).is_prime`   `print``(geek1)` `print``(geek2)`

Output:

```True
False```