Prime Cracker 4+

Name: Prime Cracker
Author: Sven Freitag

…for prime number fans

Sven Freitag

- Free

Description

• Determine a number's primality, factors or prime position
• Explore nearby prime numbers conveniently
• Check ranges of numbers for primes and twin primes

5 May 2022

Version 2.6.2

Minor improvements (iOS / watchOS / iPadOS / MacOS)

SOO HELPFULL !!

This app is awesome!!! It helped me soo much, I had tutor on a Thursday and my tutor had asked to learn prime numbers from one to fifty and of course I forgot and on the day it was June I was looking frantically for an app to help learn it and this worked perfectly 😎😇😄😃.

Question

Could you give the description of primes check algorithm, please? Might it be a mathematical theorem. Thank you in advance.

Thank you for the great rating - kindly contact me with specific questions via the e-mail address published in the help section and on the webpage of the app. I will not share source code (as that’d open a can of worms) but I’ll be happy to provide clues as to how I managed to speed up my algorithms.
I will say that I’m not a math scientist; all I did was think about ways that could speed up the very disappointing calculation speed when I first put my app together. After a couple ideas and corresponding tweaks it worked much better.

Brilliant & Interesting App

A fantastic App for those with a passing interest in numbers, factors and prime numbers. Also helpful in solving some numbers games.

The developer, Sven Freitag, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.