# Glossary

This page is an index to the main mathematical terms and phrases used throughout the Wiki.

**Composite number**- An integer that is not prime.**Exponent**- In [math]3^5[/math], 5 is the exponent.**Factor**- A divisor, see division.**Factorization**- Finding the factors of an integer.**Fast Fourier transform**- An algorithm that permits real-time signal spectrum analysis.**Fermat number**- Numbers of the form [math]2^{2^n} + 1[/math].**Generalized Fermat number**- There are different kinds of such numbers.**Lucas-Lehmer test**- A test used to prove primality of mersenne numbers.**Mersenne prime**- Primes of the type [math]2^n-1[/math] (implying n is also prime).**Pépin's test**- A test used to prove primality of Fermat numbers.**Perfect number**- An integer that is equal to the sum of its divisors, excluding itself.**Prime number**- Numbers only divisible by 1 and the number itself.

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