# Prime Rush: Math Time Attack — Brain Speed Factorization Game > Brain Speed Factorization Game (iPhone/iPad app by Ayumu Izumi.) - Source: https://appshunter.io/ios/app/prime-rush-math-time-attack/id6755986782 (this page in markdown: same URL + `.md`) - Developer: [Ayumu Izumi](https://appshunter.io/developer/1822273057) - Category: Education, Entertainment - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 17 · 21 MB - Languages: English, French, German, Japanese, Korean, Portuguese, Chinese, Spanish, Chinese - Released: 2025-12-03 - Data updated: 2026-06-30 - User reviews in markdown: https://appshunter.io/ios/app/prime-rush-math-time-attack/id6755986782/reviews.md ## What is Prime Rush? Can you factorize numbers in the blink of an eye? Challenge your brain and reflexes with Prime Rush, the ultimate prime factorization time attack game! This is not just a math drill, it is a high-speed puzzle action game where speed and accuracy are key. Perfect for students studying for exams, adults looking for brain training, and math enthusiasts who love numbers. [HOW TO PLAY] Numbers will appear on the screen. Your goal is to break them down into their prime factors before time runs out! Input the Formula: Use the intuitive keypad to enter factors like "12 -> 2^2x3". It's a Prime!: If the number is already prime, just hit the "It's Prime!" button instantly. Speed Bonus: Answer quickly to extend your time limit. Keep the combo going to achieve a high score! [KEY FEATURES] Time Attack Mode Race against the clock! Start from easy integers and work your way up to massive 3-digit numbers. Global Leaderboards: Compete with players around the world. Your nickname, score, and date are recorded when you beat your personal best. 5 Difficulty Levels: Level 1: Beginners (4 - 50) Level 5: Masters (200 - 999) Can you conquer the hardest difficulty? Practice Mode Need to study without the pressure? Practice at your own pace with no time limits. Ideal for overcoming your weak numbers and understanding the logic behind division. Note: Level 1 is free; Levels 2-5 require a Pro Plan upgrade. Built-in Factorization Calculator Includes a dedicated tool to instantly factorize any number. Use it to check your homework or explore the beauty of prime numbers. Friendly Design Featuring cute "Pochimu" characters to cheer you on. Satisfying sound effects and haptic feedback (customizable in Settings). Share your "New Record" cards directly to social media! [WHY PLAY PRIME RUSH?] Boost Mental Math: Drastically improve your calculation speed for multiplication and division. School Prep: Perfect for middle school and high school algebra preparation. Brain Teaser: A stimulating workout for your frontal cortex. Prevents brain aging with daily logic puzzles. [PRO PLAN] Unlock the full potential of Prime Rush with the Pro Plan to access all Practice Mode levels. Master every number from 4 to 999! Ready to become a Prime Master? Download Prime Rush today and start your mental math workout! ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Pro Plan | $1.99 | one-time | ## Version history (last 5 releases) ### 2.0 — 2026-06-16 ・Changed the ranking display to show up to the top 100. Other minor bug fixes and improvements. ### 1.3 — 2026-01-13 ・Minor bug fixes and performance improvements. ### 1.2 — 2025-12-06 ・Your ranking is now displayed on the result screen. ・Minor bug fixes and improvements. ### 1.1 — 2025-12-04 ・Minor bug fixes and improvements. ### 1.0 — 2025-12-03 No release notes. ## More apps by Ayumu Izumi - [空港GO！–待ち時間に！スタンプラリー&ガチャ旅&クイズ](https://appshunter.io/ios/app/go-and-and/id6747669651) - [空港コード暗記：３レターマスター!](https://appshunter.io/ios/app/id6749082421) - [Currency Converter: 163+](https://appshunter.io/ios/app/currency-converter-163-plus/id6749210576) - [川柳AI採点 – 才能アリ？才能ナシ？](https://appshunter.io/ios/app/ai/id6751155583) - [俳句AI採点 – 才能アリ？才能ナシ？](https://appshunter.io/ios/app/ai/id6751759850) - [かんたん外貨家計簿 — 世界中の通貨に対応した家計簿アプリ](https://appshunter.io/ios/app/id6752359925) All apps by Ayumu Izumi: https://appshunter.io/developer/1822273057 ## Related topics [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 2026-06-30.*