# Description

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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# Reviews

Helpfulness

Newest

Rating

Helpfulness

All Versions

All Versions

Latest Version

4.7

59 total

5 47

4 9

3 3

2 0

1 0

A Google User

Very clean app, but I would also like a "largest prime less than" option to look at some neighbouring primes

A Google User

Best one Exactly what I was searching for.. It can do anything related to primes. Good job.

A Google User

Nice clean app

A Google User

Yay my birthday is a prime. Such a cool app

User reviews

Best one Exactly what I was searching for.. It can do anything related to primes. Good job.

# Additional information

Updated

January 24, 2011

Size

68k

Installs

5,000 - 10,000

Current Version

1.2

Requires Android

2.1 and up

Content Rating

Everyone

Permissions

Report

Flag as inappropriate Offered By

Alchemy

Developer

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A simple ad-free application to show all the prime factors of a composite number or determine if it's a prime number.

Features:

- Integer Factorization / Prime Factorization

- Calculate Greatest Common Divisor (GCD, GCF, HCF) from any set of numbers

- Calculate Least Common Multiple (LCM) from any set of numbers

Input numbers can be up to 14 digits long (99 trillion).

Keywords:

Least Common Multiple, Lowest Common Multiple, Smallest Common Multiple

Greatest Common Divisor, Greatest Common Factor, Highest Common Factor

If you have any suggestions on additional functionality or bug reports, just email me and I'll be happy to take a look.

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This app allows you to:

1) Watch the list of prime numbers,

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3) Check whether your given number is a prime one! And, by the way, find all divisors of your given number!

1) Watch the list of prime numbers,

2) Highlight prime numbers among all natural numbers (from 1 to 10.000)!

3) Check whether your given number is a prime one! And, by the way, find all divisors of your given number!

This app is intended for all people who are interested in the topic of prime numbers, especially - for pupils, students and high-educated people!

For any your questions and suggestions contact me at: play.tonycode@gmail.com

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Prime factors calculator performs the prime factorization of any number up to 7 digits. With the prime factorization calculator you can factor into primes up to four numbers at once. Prime factor calculator displays the prime factorization in standard and exponential forms. For prime numbers the calculator returns the number itself.

In addition, the calculator calculates the GCF (Greatest Common Factor) and LCM (Least Common Multiple) of given numbers.

Prime factoring calculator stores last 25 results.

Requirements: Adobe AIR.

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Prime factoring calculator stores last 25 results.

Requirements: Adobe AIR.

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GCD and LCM calculator finds the greatest common divisor (GCD), also known as Greatest Common Factor (GCF) or Highest Common Factor (HCF), and Least Common Multiple (LCM), also called the Lowest Common Multiple, of two, three and four numbers.

Enter two, three or four integers and tap "Calculate".

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Requirements: Adobe AIR.

Enter two, three or four integers and tap "Calculate".

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Requirements: Adobe AIR.

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Use spaces, commas or new lines as delimiters for new numbers (how to separate different numbers from each other).

If your keyboard doesn't allow you to type spaces or commas, you'll have to download a different keyboard or use new lines to separate numbers.

Use the 'restore' button to restore the last data you entered before you closed the app the last time.

Long click on the display text, or the numbers you entered and it will bring up the option to copy or paste.

Switch between input screens for the classic GCF screen and the new, unlimited input GCF screen by clicking the options in the top right corner of the app. If you don't have the option in the top right corner, click your Menu BUTTON (which is a physical button on your phone).

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