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Screenshots

  • Prefacto - Prime Numbers screenshot 1
  • Prefacto - Prime Numbers screenshot 2
  • Prefacto - Prime Numbers screenshot 3
  • Prefacto - Prime Numbers screenshot 4

About Prefacto - Prime Numbers

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!

Ratings & reviews

4.7

19 ratings

5 ★ 89% 4 ★ 0% 3 ★ 5% 2 ★ 0% 1 ★ 5%

What’s new

Version 9.0 · Updated September 16, 2026

Updated for iOS 27

App privacy

The developer, Daniel Springer, reported these privacy practices to Apple.

Data Not Collected

The developer does not collect any data from this app.

Alternatives to Prefacto - Prime Numbers

Looking for apps like Prefacto - Prime Numbers? Here are 6 similar apps on the App Store. The highest rated is The Prime Number Finder (5.0/5), and 4 of the 6 are free to download.

Prefacto - Prime Numbers vs. alternatives
App Rating Price Last updated Compare
Prefacto - Prime Numbers 4.7 / 5 (19 ratings) 4.99 USD September 16, 2026
Numberus Prime – 2.99 USD Oct 14, 2024 Compare
CheckPrimeNumbers – 0.99 USD Sep 4, 2024 Compare
Multiply Master - Times Tables – Free Oct 19, 2026 Compare
The Prime Number Finder 5.0 / 5 (2) Free Feb 23, 2026 Compare
RISC-V Assembly Simulator 5.0 / 5 (1) Free Sep 4, 2026 Compare
Memorize Prime Numbers 3.0 / 5 (2) Free Oct 12, 2026 Compare

Compare Prefacto - Prime Numbers with the top alternatives: ratings, updates, ASO score and keyword gaps →