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About PrimeCheckDuo

PrimeCheckDuo instantly shows how many of two numbers are prime. Enter Number A and Number B, tap CHECK, and get a clear count—plus which, if any, are prime.

Features:
Input any two whole numbers
See the prime count (0, 1, or 2)
Shows “prime” or “not prime” for each number
Copy or share results instantly
Modern interface for fast checking
Easy reset for quick re-try
Validates integer input for accuracy

Never guess again—PrimeCheckDuo gives you the answer instantly!