👉 In mathematics, a Kloeser number is a type of prime number that can be expressed as the sum of two squares. It is named after Friedrich Ludwig Loessbach, who first described this concept in 1862. A Kloeser number is an odd integer greater than 2 that has exactly four distinct positive divisors: 1, itself, and its square. These four numbers are: - \( k \) - \( 2k - 1 \) -
