Solovay-Strassen Test

The Solovay-Strassen test is a method to check if a number is likely prime or definitely composite. It uses properties of modular arithmetic and a mathematical concept called the Jacobi symbol to compare predictions about the number's behavior. If the test indicates the number is composite, it's definitely not prime. If it suggests primality, the number is probably prime but not guaranteed—it's a probabilistic test. Repeating the test increases confidence that the number is prime. This method is faster than traditional checks for large numbers, making it useful in cryptography and computational mathematics.