---
title: "Prefacto - Prime Numbers - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "Discover the power of prime numbers with Prefacto!  Prefacto is your go-to app for everything related to prime numbers. Whether you're a math enthusiast, a student, or just curious, this app provides "
---

# Prefacto - Prime Numbers — United States
> Check. List. Factor. Offline.

![Prefacto App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/9d/d3/94/9dd394e9-f13c-1d09-445a-be50b33a1235/AppIcon-0-0-1x_U007epad-0-1-85-220.png/434x0w.png)

**Developer:** [Daniel Springer](https://apptail.io/developer/daniel-springer-jOcc)
**Category:** Reference
**Rating:** 4.7/5 (19 ratings)
**Price:** Free
**Bundle ID:** io.github.danispringer.Prime-Numbers-Fun
**Store:** Apple App Store
**Country:** United States
**Version:** 8.22 (released 2026-01-08)
**Original Release:** 2018-08-01
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id1402417667)
**AppTail Page:** [https://apptail.io/app/prefacto-prime-numbers-fFre/united-states](https://apptail.io/app/prefacto-prime-numbers-fFre/united-states)

## Prefacto Description
Discover the power of prime numbers with Prefacto!

Prefacto is your go-to app for everything related to prime numbers. Whether you're a math enthusiast, a student, or just curious, this app provides a comprehensive set of tools—all without requiring an internet connection.

FEATURES:

- PRIME NUMBER VERIFICATION: Instantly check if any number is prime.
- PRIME RANGE LISTING: Generate a list of prime numbers within any specified range.
- PRIME FACTORIZATION: Break down any number into its prime factors quickly and efficiently.
- GENERATE CUSTOM RANDOM PRIME NUMBERS: Create random prime numbers with customizable digits, up to 20 digits.
- SPEED TEST: Find out which phone is the fastest between your friends by racing up to 100 million.
- SAVE & SHARE RESULTS: Easily save or share your findings with others.

WHY PREFACTO?

- OFFLINE FUNCTIONALITY: Enjoy full functionality without needing an internet connection.
- LIGHTWEIGHT: Designed to be efficient and avoid taking up significant storage space on your device.
- SPEED: Experience fast calculations and instant results.
- MAXIMUM POWER: Check the **highest** numbers of **any** other app, thanks to advanced algorithms.

Dive into the fascinating world of prime numbers with Prefacto. Download now and start exploring!

## Prefacto Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/e8/4d/de/e84ddec6-5062-82ff-82e1-0fa0474c637c/3ba10321-b985-4a38-8598-fb5bd506e835_Screenshot-iPhone_13_Pro_Max-0A-Check-Home_1_C2F5CFC7-3C59-4AAC-A2FC-800D5F032118.png/1284x2778.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/39/46/c5/3946c5da-5011-afae-ef74-7a41ab20f879/a56176ba-a9ed-4159-9e0b-8675c451365a_Screenshot-iPhone_13_Pro_Max-0B-Check_1_6D7077ED-93B8-44F4-B764-18D8289EB25A.png/1284x2778.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/c7/3e/14/c73e1499-3c1a-eae7-80aa-39137ab43785/fb06a5b5-478b-4cd5-878f-f6f016189a98_Screenshot-iPhone_13_Pro_Max-1B-List_1_A40D49E6-D92C-4822-A83C-BEEDEE73CAD7.png/1284x2778.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/e2/1f/50/e21f50bb-d442-1660-a412-89781012f556/e856892f-837f-414f-9bb1-873032abe1b8_Screenshot-iPhone_13_Pro_Max-1B-List_1_3958ED7C-687F-4EE7-AC11-4B54188973EC.png/1284x2778.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/5d/96/d8/5d96d82a-0fba-916e-087a-2bfcf4c40572/69bb608b-3ba2-485c-9f32-a79a7e5097bd_Screenshot-iPhone_13_Pro_Max-00-Home_1_0FA6AAE5-5617-465C-B2CF-A70F2DC6010C.png/1284x2778.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/1b/48/59/1b48590d-25fc-6ccb-29a8-2939adff2cc8/ccf283a1-ad1f-4095-b40c-e5729620ab86_Screenshot-iPhone_13_Pro_Max-2A-Factorize-Home_1_E7FFB337-DD26-4365-89E6-604C159F5FE2.png/1284x2778.png)
- [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/5b/f4/e3/5bf4e39b-55d6-45d2-2187-381746ab12b8/c617517e-8d69-452b-8612-f14a0bbec47c_Screenshot-iPhone_13_Pro_Max-2B-Factorize_1_D28E8096-ECD6-4314-8185-483EE5722AE1.png/1284x2778.png)
- [Screenshot 8](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/36/ff/43/36ff4316-bba5-9e29-a0d3-39c240dd003c/44bc1f80-be71-4f68-8bcd-9e66a4a75491_Screenshot-iPhone_13_Pro_Max-3A-Randomize-Home_1_B05691B3-31D4-4589-9A90-5C0EF74C6E0B.png/1284x2778.png)
- [Screenshot 9](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/1d/b1/c8/1db1c801-3948-e2c2-df75-ae57521312d6/5e7db464-c5ae-4036-a257-27ba2311346d_Screenshot-iPhone_13_Pro_Max-3B-Randomize_1_86BD62FF-C627-4C5D-B105-B6797DBEC879.png/1284x2778.png)
- [Screenshot 10](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/c4/87/2b/c4872be9-91b0-173b-9dee-b3f196956104/696bf48d-b160-4cef-9a7c-4c1855ebe2b0_Screenshot-iPhone_13_Pro_Max-4B-Next_1_46FB62A9-935E-423D-A016-79CDABB7A5D4.png/1284x2778.png)

## Prefacto Rating Breakdown in United States
- 5 stars: 17 (89%)
- 4 stars: 0 (0%)
- 3 stars: 1 (5%)
- 2 stars: 0 (0%)
- 1 stars: 1 (5%)

## Prefacto Reviews in United States

### ***** "Well polished"
A powerful, fast, prime numbers galore app
-- Daniel Springer (iOS Dev), 2024-08-08

### ***** "👍🏻 Is that number prime? There’s an app for that!"
Throughout the day, I’ll occasionally find myself wondering, “Is that number prime? If not, what are its factors? How far is it from other nearby primes?” If that sounds like you, then look no further – this is the app for you!
-- GB13😎, 2023-01-06

### ***** "Prime app"
This is the PRIMEir app for prime numbers and is very fun. It's cool to look to see who's birthdays are on prime dates or not. Overall one of if not the best niche apps ever.👍👍👍👍👍
-- Sebastian H K, 2022-07-24

### ***** "An indescribable pleasure"
I’m not sure exactly why being able to calculate primes on the go is necessary; but somehow it’s empowering.  It scratches the same itch as the star tracking app.  Thanks guys.  Really love it.
-- Karlwayne1717, 2021-12-22

### ***** "Awesome app!"
This is the app you were looking for. Clean, intuitive, precise. When you need a quick answer, google is too slow. Prime will give you all the info you need.
-- Rivky Lefkowitz, 2021-12-02

### ***** "It’s useful"
Prime is an incredible app if like me, you are interested in some really cool math games. You can choose any game to start up with and go through each one of them and explore all the amazing info and tricks the app provides. Its also really useful because if you need to find out not only if a number is prime, but also by what you could divide it by, the app will do just that in a clear and fun way! It totally think YOU should get the app because its useful, fun, and overall an app that will make you feel smart😉
-- Zeldi13345, 2021-12-01

[View all Prefacto reviews and detailed analytics on AppTail](https://apptail.io/account/signup?utm_campaign=ai-crawl&utm_content=reviews)



## Prefacto Discovered Keywords
- prime numbers

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## Prefacto Available In
- [United States](https://apptail.io/app/prefacto-prime-numbers-fFre/united-states)
- [Mexico](https://apptail.io/app/prefacto-prime-numbers-fFre/mexico)
- [United Kingdom](https://apptail.io/app/prefacto-prime-numbers-fFre/united-kingdom)
- [Canada](https://apptail.io/app/prefacto-prime-numbers-fFre/canada)
- [Italy](https://apptail.io/app/prefacto-prime-numbers-fFre/italy)
- [Netherlands](https://apptail.io/app/prefacto-prime-numbers-fFre/netherlands)
- [Pakistan](https://apptail.io/app/prefacto-prime-numbers-fFre/pakistan)
- [Czechia](https://apptail.io/app/prefacto-prime-numbers-fFre/czechia)
- [Poland](https://apptail.io/app/prefacto-prime-numbers-fFre/poland)
- [Japan](https://apptail.io/app/prefacto-prime-numbers-fFre/japan)
- [France](https://apptail.io/app/prefacto-prime-numbers-fFre/france)
- [Romania](https://apptail.io/app/prefacto-prime-numbers-fFre/romania)
- [Sweden](https://apptail.io/app/prefacto-prime-numbers-fFre/sweden)
- [Denmark](https://apptail.io/app/prefacto-prime-numbers-fFre/denmark)
- [Dominican Republic](https://apptail.io/app/prefacto-prime-numbers-fFre/dominican-republic)
- [Algeria](https://apptail.io/app/prefacto-prime-numbers-fFre/algeria)
- [Ecuador](https://apptail.io/app/prefacto-prime-numbers-fFre/ecuador)
- [Egypt](https://apptail.io/app/prefacto-prime-numbers-fFre/egypt)
- [Spain](https://apptail.io/app/prefacto-prime-numbers-fFre/spain)
- [Finland](https://apptail.io/app/prefacto-prime-numbers-fFre/finland)
- [Greece](https://apptail.io/app/prefacto-prime-numbers-fFre/greece)
- [Hong Kong SAR China](https://apptail.io/app/prefacto-prime-numbers-fFre/hong-kong)
- [Indonesia](https://apptail.io/app/prefacto-prime-numbers-fFre/indonesia)
- [Ireland](https://apptail.io/app/prefacto-prime-numbers-fFre/ireland)
- [Israel](https://apptail.io/app/prefacto-prime-numbers-fFre/israel)
- [India](https://apptail.io/app/prefacto-prime-numbers-fFre/india)
- [South Korea](https://apptail.io/app/prefacto-prime-numbers-fFre/south-korea)
- [Kuwait](https://apptail.io/app/prefacto-prime-numbers-fFre/kuwait)
- [Kazakhstan](https://apptail.io/app/prefacto-prime-numbers-fFre/kazakhstan)
- [Lebanon](https://apptail.io/app/prefacto-prime-numbers-fFre/lebanon)
- [Sri Lanka](https://apptail.io/app/prefacto-prime-numbers-fFre/sri-lanka)
- [Lithuania](https://apptail.io/app/prefacto-prime-numbers-fFre/lithuania)
- [Malaysia](https://apptail.io/app/prefacto-prime-numbers-fFre/malaysia)
- [Nigeria](https://apptail.io/app/prefacto-prime-numbers-fFre/nigeria)
- [Norway](https://apptail.io/app/prefacto-prime-numbers-fFre/norway)
- [New Zealand](https://apptail.io/app/prefacto-prime-numbers-fFre/new-zealand)
- [Peru](https://apptail.io/app/prefacto-prime-numbers-fFre/peru)
- [Philippines](https://apptail.io/app/prefacto-prime-numbers-fFre/philippines)
- [Portugal](https://apptail.io/app/prefacto-prime-numbers-fFre/portugal)
- [Russia](https://apptail.io/app/prefacto-prime-numbers-fFre/russia)
- [Saudi Arabia](https://apptail.io/app/prefacto-prime-numbers-fFre/saudi-arabia)
- [Singapore](https://apptail.io/app/prefacto-prime-numbers-fFre/singapore)
- [Thailand](https://apptail.io/app/prefacto-prime-numbers-fFre/thailand)
- [Türkiye](https://apptail.io/app/prefacto-prime-numbers-fFre/turkey)
- [Taiwan](https://apptail.io/app/prefacto-prime-numbers-fFre/taiwan)
- [Ukraine](https://apptail.io/app/prefacto-prime-numbers-fFre/ukraine)
- [Vietnam](https://apptail.io/app/prefacto-prime-numbers-fFre/vietnam)
- [United Arab Emirates](https://apptail.io/app/prefacto-prime-numbers-fFre/united-arab-emirates)
- [South Africa](https://apptail.io/app/prefacto-prime-numbers-fFre/south-africa)
- [Argentina](https://apptail.io/app/prefacto-prime-numbers-fFre/argentina)
- [Austria](https://apptail.io/app/prefacto-prime-numbers-fFre/austria)
- [Australia](https://apptail.io/app/prefacto-prime-numbers-fFre/australia)
- [Azerbaijan](https://apptail.io/app/prefacto-prime-numbers-fFre/azerbaijan)
- [Belgium](https://apptail.io/app/prefacto-prime-numbers-fFre/belgium)
- [Bulgaria](https://apptail.io/app/prefacto-prime-numbers-fFre/bulgaria)
- [Belarus](https://apptail.io/app/prefacto-prime-numbers-fFre/belarus)
- [Switzerland](https://apptail.io/app/prefacto-prime-numbers-fFre/switzerland)
- [Chile](https://apptail.io/app/prefacto-prime-numbers-fFre/chile)
- [China](https://apptail.io/app/prefacto-prime-numbers-fFre/china)
- [Colombia](https://apptail.io/app/prefacto-prime-numbers-fFre/colombia)
- [Germany](https://apptail.io/app/prefacto-prime-numbers-fFre/germany)

---

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