1. The problem is to find the link between two prime numbers. 2. Prime numbers are numbers greater than 1 that have no divisors other than 1 and themselves. 3. A common link between two prime numbers is their difference, which can be used to identify twin primes or prime gaps. 4. Twin primes are pairs of primes that differ by 2, for example, 3 and 5, 11 and 13. 5. To find if two primes $p$ and $q$ are linked as twin primes, check if $$|p - q| = 2$$. 6. Another link is the concept of prime gaps, which is the difference between consecutive primes. 7. For example, if $p$ and $q$ are consecutive primes, the prime gap is $$q - p$$. 8. These links help in studying the distribution of prime numbers. 9. Therefore, the link between two prime numbers can be expressed as their difference, especially focusing on whether it equals 2 for twin primes or other values for prime gaps.