Wall–Sun–Sun prime
= Wall–Sun–Sun prime
{wiki=Wall–Sun–Sun_prime}
The Wall–Sun–Sun prime is a special type of prime number that is defined in relation to a specific type of sequence known as the Fibonacci sequence. A Wall–Sun–Sun prime is a prime number that can be expressed in the form \\( F_\{k+1\} - 1 \\), where \\( F_k \\) is the \\( k \\)-th Fibonacci number.