A Cousin Prime is a type of prime number that is part of a pair of prime numbers that differ by four. For example, the pair (3, 7) consists of two cousin primes because both numbers are prime and their difference is 4. Cousin primes are a subset of prime numbers, which are numbers greater than 1 that have no positive divisors other than 1 and themselves. They are related to other prime pairs, such as twin primes (which differ by 2) and sexy primes (which differ by 6).