What is Semiprime number?
In [[number theory]], a [[natural number]] is called '''semiprime''' if it can be written as the [[product (mathematics)|product]] of two [[prime number]]s. The two numbers do not need to be different. A semiprime can also be the square of a prime number. Such numbers are very useful for [[cryptography]]. {{math-stub}} {{Divisor classes}} [[Category:Number theory]]