# Prime Factors — user reviews > 28 indexed App Store user reviews of Prime Factors by Paul Hangas, rated 3.90/5 from 24 ratings. - Source: https://appshunter.io/ios/app/prime-factors/id741746948/reviews - App overview in markdown: https://appshunter.io/ios/app/prime-factors/id741746948.md - Rating breakdown: 5★ 16 · 4★ 1 · 3★ 0 · 2★ 2 · 1★ 5 ## Newest reviews (11 of 28) ### 5/5 — Fascinating *2016-11-27, version 1.0* I've always been fascinated by numbers, factors and prime numbers. This app allows me to explore the wonderful Orleans of numbers. ### 5/5 — Great app! *2016-11-23* Great app and very helpful with school. ### 5/5 — THE BEST PRIME NUMBERS APP EVER. *2016-03-01* This is must-have app for numberphiles. I really thank the developer of this app SINCERELY. ### 5/5 — Best Prime Number App *2015-12-02* This is just what I was looking for. It has a TON of numbers in the list and it is very visually appealing. It runs smoothly and the search feature is good too. Best of all, its free. One thing that would be nice is if it could also factorialize numbers as well as give prime factors. All in all, it is a great app. ### 5/5 — Best Prime Finder Ever! *2015-07-01* Simple, Easy, and Powerful ### 5/5 — Finally *2015-06-24* Just what I was looking for ### 5/5 — Muito útil *2015-04-10* Muito útil ### 5/5 — Simply Beautiful *2014-09-16* Absolutely beautiful application , Must love Primes in order to truly appreciate ,. Thank you. ### 5/5 — Get what you see on the box *2014-03-23* Nice little app. Clean and not buggy. Does what it says it does. ### 5/5 — Excellent! *2013-11-30, version 1.0* Great journey into the world of numbers. Very useful, effective and nicely presented. ### 5/5 — Prime App! *2013-11-22* This is the best of the Prime number apps! The visual representation of the primes is wonderful. Great way to find the prime numbers near a specific number too. ## Most critical reviews (10 lowest-rated) ### 1/5 — Beautiful app, but has stopped working *2025-07-06* This was a beautiful, elegant, and useful app, one of my favorite math apps to use. But it stopped working a while ago. You can still scroll through all the numbers and see which are prime, but you can’t search for specific numbers any more and the app won’t give you the prime factors for any number any more. I hope this is updated before long! I haven’t found another prime factorization app anywhere near as satisfying to use. ### 1/5 — No longer works *2025-02-09* App only identifies prime numbers in red but does not give the prime factors of the nonprime numbers. ### 1/5 — Dec 2024. App does not work *2024-12-07* When I try to press a number absolutely nothing works, and this is across all of my iPads. I think this app is completely broken. Do not download until the developer has updated it. ### 1/5 — Not working *2024-10-29* When I click on a number nothing happens. I can’t see properties. Fraud app. Spam ### 2/5 — Accessibility *2025-05-12, version 2.5* It’s been brilliant but just recently I can’t access the app’s functions at all! I’ve tried reloading it, etc, but to no avail! I love this usually! ### 2/5 — I would rather pay to see no ads *2019-01-10* The app works, but the ads are very, very annoying. It’s a combination of outside ads and ads for the developers own apps. I would rather pay for the app than see the ads. If I didn’t have to see the ads, I would rate this app four or five stars. I am deleting this app, I can’t handle the ads. ### 4/5 — Best Prime Number App *2015-08-22* but please enable the ad free version for 0.99€. I love this app. Thanks to Paul Hangas ### 5/5 — Beautiful app, so happy it’s working again *2025-09-06* This is a beautiful, elegant, and useful app, one of my favorite math apps to use. I was very sad when it stopped working sometime last year, but now it’s been updated and it’s working again. I haven’t found another prime factorization app anywhere near as satisfying to use, so I’m very happy it’s back. ### 5/5 — The best for me *2025-03-06* Edit: this app quite working a few months ago after ios18 updates. Still shows primes but doesn’t show factors of other numbers when you click on them. Really loved this app before. This app is perfect for me, I’m always jotting numbers down for patterns and god knows what. Big problem tho. It quite working after ios18 update. Please fix asap. ### 5/5 — Greatest App in Apple’s AppStore *2025-01-17, version 2.5* I have used this app daily for at least 8 yrs while searching for new primes to use in divining the wisdom of ancient Babylon and even further beyond. Paul Hangas is brilliant and adventurous mind, Kudos to you! ## Most praised reviews (7 highest-rated) ### 5/5 — The best for me *2024-12-17* This app is perfect for me, I’m always jotting numbers down for patterns and god knows what. Big problem tho. It quite working after ios18 update. Please fix asap. ### 5/5 — Problem with app *2024-11-23* Paul, as of this morning, Prime Factors stopped displaying factors. Are you able to update it? Thank you kindly. ### 5/5 — Muito bom *2020-04-06* Incrível, mas poderia ter atualização para iPhone 10 ### 5/5 — Helpful *2020-03-12* Just yep it’s great. ### 5/5 — Greaaaaat *2018-11-09* This app is really good! I love how far up it can go. It can go up to over 100 Billion! ### 5/5 — Espectacular! *2018-09-23* Realmente es espectacular esta aplicación! Poder ver los números primos y los factores primos hasta el 1 billón es súper impresionante. ### 5/5 — Great app! I use it every day! *2017-02-22* When I write in my journal, I check every day how many days old I am, and put the prime factors in my journal. This app is perfect for that. --- *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 2026-09-02.*