Check if any number is prime and get its complete prime factorisation, nearest prime neighbours, and the list of all primes up to 100.
A natural number greater than 1 with no divisors other than 1 and itself. First primes: 2, 3, 5, 7, 11, 13...
No. Primes must have exactly two factors. 1 has only one factor.
As of 2024, over 40 million digits — a Mersenne prime. Finding large primes is crucial for cryptography.
RSA encryption relies on the fact that factoring the product of two large primes is computationally infeasible.
A number with more than two factors. All positive integers greater than 1 are either prime or composite.