Calculator
Fast competitive-programming helpers with visible inputs, constraints, and reusable result history.
Number theory
Primes, divisors, gcd, lcm
Operation guide
Inputs and constraints stay visible while you calculate.
THEORY & USE CASE
Used in cryptography (RSA), hashing, and to quickly filter out numbers with multiple divisors in mathematical algorithms.
DESCRIPTION
Check if P is a prime number.
CONSTRAINTS
P >= 1
Results
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Enter values and click Run to compute.