Hildebrand's Theorem is a result in number theory that deals with the distribution of prime numbers. It provides a way to estimate the number of prime numbers less than a given number, using a specific mathematical formula. This theorem helps mathematicians understand how primes are spread among the integers. The theorem is named after Hildebrand, who contributed to the field of analytic number theory. It builds on earlier work related to the Prime Number Theorem, which describes the asymptotic distribution of primes. Hildebrand's Theorem refines these ideas, offering more precise estimates in certain contexts.