Prime Factory

Prime Factory


A richly featured app for everything involving prime numbers.

Available utilities:
-Test numbers for primality.
-Calculate a number's unique prime factorization.
-List every divisor of a number.
-Generate a random prime, with the option to specify a range in which the prime is to be found.
-Browse through a complete list of the first 10,000 primes.
-Calculate pi(n), the prime counting function. This is the number of primes less than or equal to n.
-Calculate the greatest common divisor (GCD) of two numbers.
-Calculate the lowest common multiple (LCM) of two numbers.
-Find the value of Euler's totient function, phi(n). This is the number of positive integers less than or equal to n that are coprime to n.

Most features allow testing of numbers up to 9,999,999,999,999,999 (10^16 -1).

This app is completely free and is not ad supported.
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Free
94
4.7
User ratings
58
Installs
5,000+
Concerns
0
File size
68 kb
Screenshots
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About Prime Factory
A richly featured app for everything involving prime numbers.

Available utilities:
-Test numbers for primality.
-Calculate a number's unique prime factorization.
-List every divisor of a number.
-Generate a random prime, with the option to specify a range in which the prime is to be found.
-Browse through a complete list of the first 10,000 primes.
-Calculate pi(n), the prime counting function. This is the number of primes less than or equal to n.
-Calculate the greatest common divisor (GCD) of two numbers.
-Calculate the lowest common multiple (LCM) of two numbers.
-Find the value of Euler's totient function, phi(n). This is the number of positive integers less than or equal to n that are coprime to n.

Most features allow testing of numbers up to 9,999,999,999,999,999 (10^16 -1).

This app is completely free and is not ad supported.
User reviews of Prime Factory
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Android Market Comments
A Google User
Jul 31, 2014
A very interesting app. Loved it
A Google User
Jul 1, 2013
The icon. What happened with the icon?
A Google User
Jan 1, 2013
Good
A Google User
Jan 1, 2013
Good
A Google User
Nov 28, 2012
Very clean app, but I would also like a "largest prime less than" option to look at some neighbouring primes