Prime factorization

Revision as of 09:30, 23 June 2006 by JBL (talk | contribs)

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

${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, for instance, to simplify fractions.

Example Problem

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