Prime Numbers API is a tool for requesting prime numbers or data associated with a prime or composite (non-prime) number.  With five endpoints, users can request a random prime number, check if a number is prime, gather all the prime numbers between two numbers, get density values of primes in a certain range, get an isolated random prime that's super far from a neighbor, get tons of information about their results, and more!  Prime numbers are extremely useful to many, including mathematicians, data scientists, and security experts, to name a few.  

They are difficult to acquire, though.  Think about it, how many numbers are there? Infinite--that's how many. How many prime numbers are there? Good question.  How many APIs have had 10 active servers running for years on end, non-stop, to count and calculate each individual number?  One: Prime Numbers API

No other database in the world even comes remotely close to 5+ billion primes and 130+ composite numbers! Prime Numbers API aims to be the one-stop-shop for anyone in need of prime numbers and their respective data. It is a truly unique API.

The API's responses can be used for websites (including desktop and mobile applications), smart cars, home or office devices, wearable devices, robots, internet of things, telecom devices, or even servers!

Absolutely! If you visit our Documentation page and select any of the docs for an endpoint, Get Isolated Random Prime (paid) for example, you can view example requests, their headers, and responses!

With the Prime Numbers API output, you can determine:

• Isolated: rare prime numbers with an average density of 0.000124565509% that are 200 to 500+ composite numbers away from each of their neighbours
• Palindromes: primes which reads the same backwards as forwards (examples: 101, 373, 919)
• Twins: primes that are no more than 2 composite numbers from each other (examples: (5, 7), (11, 13), (17, 19))
• Cousins: primes that are no more than 4 composite numbers from each other (examples: (7, 11), (37, 41), (43, 47))
• Sexys: primes that are no more than 6 composite numbers from each other (examples: (7,13), (13,19), (23,29))
• Reversibles: primes that become a different prime when their decimal digits are reversed (examples: 37, 107, 149)
• Pandigitals: primes in a base has at least one instance of each base digit (examples: 2143 (base 4), 7654321 (base 7))
• Repunits: primes are positive integers in which every digit is one (examples: 11, 1111111111111111111)
• Mersenne: primes that is of the form 2n - 1 (one less than a power of two) for some integer n (examples: 3 (2^2 - 1), 7 (2^3 - 1), 31 (2^5 - 1) )
• Fibonacci: primes that are also Fibonacci numbers (examples: 89, 233, 1597)
• Prime type densities: how many prime type numbers in percentage can be found in every million composite numbers
• ...and so much more!

The average prime numbers mining speed is over 75 million composite numbers per day! Therefore, the live database is updated at least twice per month with more than 45 million home-grown, curated, and 100% genuine primes at a time!

When an initial order is placed, it takes 24 hours to clear the payment and validate the API credentials. If you wish to cancel before your API key is validated, you will get a full refund. Please follow the Contact link under the Support tab of the header menu at the top of every page. Select General Support for the Topic.

If the API key is already issued, it is no longer possible to cancel the current monthly payment cycle. The next month's payment and subscription will be canceled, however. 

API endpoints are specific URL addresses that allow communication with a database or service. In this case: the Prime Numbers API database. Each endpoint is designed to ask the database to do something specific. For example, the get-random-prime endpoint asks the database to present a random prime number (and any relevant data that was also asked for via optional parameters). In contrast, the get-isolated-random-prime endpoint, by default, asks the database for a prime number that lies at least 200 numbers from its nearest prime neighbor, or up to 500 numbers away if the minimum_combined_prime_gap parameter is set to 500.

Absolutely! If you hover over the    symbol on a product's block and select Compare this Product, then do the same for another product, you can click the same symbol at the top right of the header menu to navigate to a page that will specifically compare the plans you selected. You can compare two, three, or all four at once.

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We offer a multitude of Code Examples, as well as Documentation for each request endpoint, in a host of languages to help you get started with integrating Prime Numbers API calls into your application! 

• knowledge of HTTP-based APIs
• knowledge of JSON
• fluent in the development language that you need the API integrated with