# Prime Cracker — …for prime number fans > App for determining primality, factors, and exploring prime number sequences. (iPhone/iPad app by Sven Freitag.) - Source: https://appshunter.io/ios/app/prime-cracker/id1281280649 (this page in markdown: same URL + `.md`) - Developer: [Sven Freitag](https://appshunter.io/developer/1281280648) - Category: Education, Utilities - Price: Free - Rating: 4.90/5 from 31 App Store ratings · 13 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 6 MB - Languages: American English, German (Germany) - Released: 2017-09-11 - Data updated: 2026-07-04 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/prime-cracker/id1281280649/reviews.md ## What is Prime Cracker? • Determine a number's primality, factors or prime position • Explore nearby prime numbers conveniently • Check ranges of numbers for primes and twin primes ## Key features - Determine primality and factors - Find prime position - Explore nearby primes - Check number ranges for primes - Identify twin primes ## Recent user reviews (10 of 13) All indexed reviews: https://appshunter.io/ios/app/prime-cracker/id1281280649/reviews.md ### 5/5 — Enthusiast *2024-09-07* Over past year or so, I have thoroughly enjoyed this website and, because having a great interest in the distribution of prime numbers and their constellation of patterns, I use it constantly — days on end. I live in Lynnwood, Washington and surmise that you, Sven Freitag, are located in Kirkland. Please drop me a line ### 5/5 — SOO HELPFULL !! *2024-07-04, version 2.6.2* 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 😎😇😄😃. ### 5/5 — Mark *2021-03-30* Just Blown Away to see this! ### 5/5 — Danke! *2021-03-29* Hallo Sven Ich habe gerade dein Programm im Mac App Store entdeckt und frage mich beim Ausprobieren zum Finden von Primzahlen, ob irgendwo eine Liste von Primzahlen in der App hinterlegt ist, die das Ergebnis so schnell anzeigt? Bei der Suche von 1 bis 100.000.000 Millionen hat mein altes Mac Book Pro gefühlt 10 Minuten gebraucht. 2 unbekannte Primzahlen multiplizieren ist ja ein Bestandteil der RSA Verschlüsselung. Kann man das Ergebnis zum Beispiel irgendwie in eine Tabelle speichern? Beste Grüße Dirk **Developer response:** Alles Echtzeitberechnung / keine Nachschautabellen (jedenfalls bis jetzt); Feature-Anfrage notiert! ### 5/5 — Excellent *2021-03-03* Great utility, very helpful. ### 5/5 — Gerd *2020-11-20* One of the best Primknackers in the modern world. **Developer response:** Well thank you... keep cracking :) ### 5/5 — Regarding Prime cracker v2.4 *2020-05-05* 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. ### 5/5 — Brilliant & Interesting App *2020-02-25, version 2.4* A fantastic App for those with a passing interest in numbers, factors and prime numbers. Also helpful in solving some numbers games. ### 5/5 — Question *2020-02-08, version 2.4* Could you give the description of primes check algorithm, please? Might it be a mathematical theorem. Thank you in advance. ### 5/5 — Holy Molie! *2019-05-10* 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 ## Frequently asked questions about Prime Cracker ### What can Prime Cracker do? Prime Cracker allows you to determine a number's primality and factors, find its prime position, and explore nearby prime numbers. It can also check ranges of numbers for primes and twin primes. ### Is Prime Cracker free to use? Yes, Prime Cracker is available for free. It does not require any payment to download or use its core functionalities. ### What devices does Prime Cracker support? Prime Cracker is compatible with a wide range of Apple devices, including Mac, Apple Watch, iPhone, iPad, and iPod. ### How often is Prime Cracker updated? The latest version, 2.6.2, was released on May 5, 2022. The app was initially released on September 11, 2017, indicating it receives periodic updates. ### What is the age rating for Prime Cracker? Prime Cracker has an age rating of 4+, making it suitable for a broad audience interested in mathematical exploration. ### Does Prime Cracker have ads? No, Prime Cracker does not contain advertisements. Users can explore prime numbers without any interruptions. ### What is the user sentiment for Prime Cracker? Based on 31 ratings, Prime Cracker has an exceptionally high rating of 4.9 stars, suggesting overwhelmingly positive user sentiment. ### Can Prime Cracker help with learning prime numbers? Yes, Prime Cracker is designed for educational purposes, allowing users to actively explore and understand concepts related to prime numbers, factors, and number sequences. ## Version history (last 5 releases) ### 2.6.2 — 2022-05-05 Minor improvements (iOS / watchOS / iPadOS / MacOS) ### 2.6.1 — 2020-12-04 • Added thousand separators (if activated in Settings) to input text fields, improved text validation • Apple Watch app update: Added buttons to browse numbers, improved text validation ### 2.6 — 2020-11-20 • Added requested ability to conveniently browse numbers by adding new buttons to Prime Check • Improved user input validation and user guidance with a Quick Help and controlled availability of UI elements • Minor improvements in all areas ### 2.5.1 — 2020-11-06 • Minor Dark Mode improvements • Hardware keyboard support (see updated Help topic on that subject) ### 2.5 — 2020-10-28 • Dark Mode support (if enabled in your device's display settings; iOS 13 or newer is required) - finally you can crack prime numbers in the dark! • Minor UI tweaks • MacOS version (Catalina 10.15) added ## Apps similar to Prime Cracker | App | Rating | Price | Category | | --- | --- | --- | --- | | [The Prime Number Finder](https://appshunter.io/ios/app/the-prime-number-finder/id6741829020) | 5.0 (2) | Free | Education | | [Rectangles & Primes](https://appshunter.io/ios/app/rectangles-and-primes/id1572074176) | — | Free | Education | | [Find Prime Num](https://appshunter.io/ios/app/find-prime-num/id1505409395) | 5.0 (1) | Free | Education | | [Prime number Snake Panic](https://appshunter.io/ios/app/prime-number-snake-panic/id1595460548) | 4.5 (11) | Free | Education | | [Prime Checker](https://appshunter.io/ios/app/prime-checker/id389112910) | 5.0 (3) | Free | Education | | [Prime Factors](https://appshunter.io/ios/app/prime-factors/id741746948) | 3.7 (24) | $0.99 | Education | ## Related topics [next level prime](https://appshunter.io/ios/topics/next-level-prime) · [801 prime](https://appshunter.io/ios/topics/801-prime) · [prime numbers](https://appshunter.io/ios/topics/prime-numbers) · [cracker](https://appshunter.io/ios/topics/cracker) · [touch the prime numbers](https://appshunter.io/ios/topics/touch-the-prime-numbers) · [prime factorization](https://appshunter.io/ios/topics/prime-factorization) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-04.*