# Prime Cracker — user reviews > 13 indexed App Store user reviews of Prime Cracker by Sven Freitag, rated 4.90/5 from 31 ratings. - Source: https://appshunter.io/ios/app/prime-cracker/id1281280649/reviews - App overview in markdown: https://appshunter.io/ios/app/prime-cracker/id1281280649.md - Rating breakdown: 5★ 29 · 4★ 2 · 3★ 0 · 2★ 0 · 1★ 0 ## Newest reviews (3 of 13) ### 5/5 — Perfekt *2019-04-21* Genau das, was ich gesucht hatte, eine Primzahl-Prüfung und Primfaktorzerlegung und sogar eine Übersicht über einen Zahlenbereich! Top wäre jetzt noch die Nummer der Primzahl, d.h. die wievielte es ist, wäre eine schöne Erweiterung. ### 5/5 — Hammerteil *2017-09-16* Nehme die App auch zum Zeitmessen beim kochen und grillen. ### 5/5 — A life changing app! *2017-09-15* I used to spend way too much time cracking prime numbers manually. But then I found Prime Cracker! Thank you for giving me my life back, Prime Cracker!!! ## Most critical reviews (10 lowest-rated) ### 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 --- *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.*