## What is numere-prime.ro?

numere-prime.ro is a website that provides you with the online capability of:

- running automatically prime factorization on composite numbers (decompose, break down numbers into prime factors)
- determining whether a number is prime or not
- calculating the greatest common factor GCF (also called the greatest common divisor GCD, or the highest common factor HCF) of two numbers
- calculating the least common multiple LCM of two numbers
- reducing math ordinary fractions to lower terms (fractions simplification)
- checking if a number is divisible by another
- calculating all the divisors of a number or all the common divisors of two numbers
- determining whether two numbers are coprime (prime to each other)
- checking on numbers' parity (even or odd)

## What is the main purpose of numere-prime.ro

numere-prime.ro aims to provide users a free reliable collection of tools that automatically perform operations related to prime factors or numbers' parity. This tool can be used both as a tool to perform the above operations fast, in order to save time, but also as an online checking tool for those knowing how to do those operations by themselves.

## Why this website?

In 2012 I wrote a short article about prime numbers in the section of "known facts" of haios.ro website. This short article contained a list of prime numbers up to 200. I noticed that the site visitors were very interested in this short article.

Here's a link to this article, containing a list of prime numbers up to 200, in the section of haios.ro curiosities (Romanian language): list of prime numbers up to 200. From here to the idea of creating a website that automatically performs the prime factorization algorithm in order to determine whether a number is prime or not, it was not a long way: numbere-prime.ro.

## What can you do?

If you find this website useful, spread the word, tell your friends, colleagues and those that need a prime factorization tool. At the same time, any feedback to improve our service is more than welcomed and ultimately helps all the visitors.

## Thanks

We thank all our visitors that recommend friends and colleagues numere-prime.ro website or come by with valuable suggestions. Our site will continue to grow and develop thanks to you and your opinions. :-)

## numere-prime.ro team

email / contact: email numere-prime.ro