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Prime Factors

John Zangwill Tools

Instant factorization of numbers up to 15 digit

Downloads
202+
on Google Play
Price
Free
No in-app purchases
Updated
Feb 9
2026 · v1.2.2
Get it onGoogle Play See alternatives

Screenshots

  • Prime Factors screenshot 1
  • Prime Factors screenshot 2
  • Prime Factors screenshot 3
  • Prime Factors screenshot 4

About Prime Factors

Understand the structure of whole numbers at a glance.

Prime Factors helps you explore how numbers are built by instantly breaking them down into their prime components.

Use the built-in numeric keypad to enter numbers up to 15 digits, and see the factorization update immediately. Ideal for quick checks, number exploration, and support during arithmetic practice or online tests.

Simple, fast, and focused — no clutter, just clear results.

What’s new

Version 1.2.2 · Updated February 9, 2026

Replaced delete icon with unicode symbol for consistent appearancance when inactive

User reviews

Sonal Sabu
Sonal Sabu
very best app I have used to find prime numbers. it can take check the 15 digit I have love it.
Mark Ramshaw
Mark Ramshaw
excellent app for finding the prime factors of a number.
Mark Zangwill
Mark Zangwill
very nice
Adrian Zangwill
Adrian Zangwill
helped me with online numeracy test

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