PHP Classes

PHP Find Prime Factors: Get the prime factors of a number upto 100 billion

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2016-01-13 (4 years ago) RSS 2.0 feedStarStarStarStar 72%Total: 209 This week: 1All time: 8,175 This week: 381Up
Version License PHP version Categories
prime-factors 1.0Free for non-comm...4.0Algorithms, Math
Description Author

This class can get the prime factors of a number upto 100 billion.

It takes a number and decomposes it into factor numbers that are prime.

The class returns the prime factors in an array variable. Optionally it can output all the prime factors as it finds them.

It uses a data file to extract the lowest prime factors faster.

  Performance   Level  
Name: Abhishek Shukla <contact>
Classes: 5 packages by
Country: India India
Age: ???
All time rank: 76044 in India India
Week rank: 59 Up10 in India India Up


// Class Prime Factors
// It finds factors of whole numbers upto 100 Billion very fast and accurate
// using a pre-existing data set. 
// Date Created : Jan 13, 2016
// Last Modified:
// Version 1.00
// This Software Should not be commercially used without prior and 
// explicit permission of the Author
Usage is very simple
1) Include class script file 


2) Initiate a new object of class prime_factors
	$test=new prime_factors;

3) Call factorize function passing the desired whole number in braces
	The output is 'Finding factors of 13... 13';
	The output is 'Finding factors of 1024... 2,2,2,2,2,2,2,2,2';

4) By default class echoes the result, but setting $test->echo=0; will mute the echoes.

5) $factors=$test->factorize(N); syntax returns array of all prime factors of N.
	If N itself is prime array containing only one factor N is returned.

6) This class comes with a pre-existing data set used for speedy alogorithm which should 
	be kept intact for integrity of results.  Any changes in that data-set may result in 
	wiered or falsified results.
  • primefactors.jpg
  Files folder image Files  
File Role Description
Accessible without login Plain text file pdata Data Data Set for prime factorization
Plain text file primefactors.php Class Class Prime Factors
Accessible without login Plain text file readme.txt Doc. readme
Accessible without login Plain text file test.php Example test page

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