Pseudoprimes

A pseudoprime is a composite number that behaves like a prime number in certain mathematical tests designed to identify primes. While these tests typically distinguish primes from composites, pseudoprimes can pass as prime in specific scenarios, even though they are actually composite. This phenomenon occurs because some composite numbers share properties with primes that make them appear prime under particular algorithms. Recognizing pseudoprimes helps mathematicians understand the limitations of prime testing methods and ensures more accurate identification of prime numbers in cryptography and number theory.