About Prime Hunter
Sixteen numbers. Some are prime. Some aren't. Tap only the primes — fast. Wrong tap = penalty. Find them all to advance to the next round.
How to Play
- Press Start
- 16 numbers between 2-99 appear in a grid
- Tap ONLY the primes (+5 each)
- Tap a composite by accident? −3 points
- Find all primes for a round bonus
Tips & Strategy
- Even numbers are NEVER prime (except 2). Skip them instantly.
- Numbers ending in 5 are NEVER prime (except 5). Skip those too.
- If a number's digits sum to a multiple of 3, it's divisible by 3 — not prime
- Memorize primes under 50: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47
Brain Benefits
Prime Hunter builds number sense — an intuitive feel for how numbers behave. Prime recognition is a foundational skill in cryptography, number theory, and competitive math.