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Prime factorization

Revision as of 14:12, 29 June 2006 by MCrawford (talk | contribs) (added resources)

For a positive integer $n$, the prime factorization of $n$ is an expression for $n$ as a product of powers of prime numbers. An important theorem of number theory called the Fundamental Theorem of Arithmetic tells us that every positive integer has a unique prime factorization, up to changing the order of the terms. The form of a prime factorization is ${p_1}^{e_1}\cdot$${p_2}^{e_2}\cdot{p_3}^{e_3}\cdots{p_k}^{e_k} = n$, where n is any natural number, the $p_{i}$ are prime numbers, and the $e_i$ are their positive integral exponents. Prime factorizations are important in many ways. One instance is to simplify fractions.

Example Problem

The prime factorization of 378 is $2^1\cdot3^3\cdot7^1$.


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