Crack big numbers with 64-bit power!

Find out in a snap about prime status, prime factors, prime position and prime numbers (as well as twin primes among those) within ranges of numbers.

What’s New

Version 2.4

• Added enumerated prime factor result options in response to user request
• Added non-exponential prime factor result option
• Re-organized settings, options that may have performance impact are now marked in yellow
• Expanded the ability to cancel calculations and output of very large prime numbers and ranges
• Minor user interface improvements in all areas

Ratings and Reviews

4.9 out of 5
17 Ratings

17 Ratings

nklee3497 ,

Regarding Prime cracker v2.4

This is a wonderful app for quickly finding out whether or not a given number is prime. I like how it even gives you all the possible factors of the number itself. I would highly recommend this app to anybody interested in learning about different types of numbers: Composite, Prime, etc.

bodycode ,

Holy Molie!

Incredible primes explorer. Ultra fast, flexible, user friendly and the best prime number tool in the world for what it does and I’ve checked a lot of apps out.

Ranges, enumeration, twins, validation check, what’s not to like! THANK YOU genius programmers, and as far as I can tell free full version

Emiliohodoggio ,


It's an amazingly useful app.
In the middle if the night, when I wonder if a certain number is a prime, this app gives me the answer.


Sven Freitag
35.3 MB

Requires iOS 10.0 and watchOS 3.2 or later. Compatible with iPhone, iPad, and iPod touch.


English, German

Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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