prime number
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Examples forPrime Numbers

Prime Numbers

Determine whether a number is prime:

Is 10001 prime?

Specify a prime by its position in the sequence 2, 3, 5, ...:

39th prime
1,000,000th prime

Generate a list of primes:

primes <= 100
primes between 100,000 and 101,000

Find the nearest prime to a given number:

prime closest to 169743212304

Prime Factorization

Compute a prime factorization:

factor 70560
factor 1,000,000,001

Classes of Primes

Find a twin prime pair:

1000th twin prime

Find a Mersenne prime:

20th Mersenne prime

Find one of the few known Fermat primes:

4th Fermat prime

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