factor

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Description

Determines prime factorization of input integer

Arguments and Return Values

Parameters: An integer to be factored

Return Value: An Nx1x1 array whose elements give the prime factors of the input integer

Usage

Syntax: factor(n)

The input must be a scalar positive integer between 2 and intmax (2,147,483,647), inclusive.

When factor() is entered without any arguments, it prints its description, as shown below.

Examples

dv> factor()

Returns prime factorization of input integer
Input must be a scalar postive integer >= 2
This function does not use a very efficient algorithm, but on a decent
 computer it takes less than a second for any positive integer.
Only for integers, so inputs greater than intmax (2147483647) are refused.
S.Marshall 11-18-2009

0
dv> factor(60)
4x1x1 array of int, bsq format [16 bytes]
2       2       3       5
dv> factor(5040)
8x1x1 array of int, bsq format [32 bytes]
2       2       2       2       3       3       5       7
dv> factor(-2)

Error! Input must be a scalar positive integer!

0
dv> factor(4//6)

Error! Input must be a scalar positive integer!

0

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Recent Library Changes

Created On: 11-18-2009
Modified On: 11-18-2009

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