Prime Number Calculator

Prime Test

A prime number is a whole number greater than 1 with only two factors: 1 and itself.

Method: small divisibility checks plus BigInt Miller-Rabin testing for large whole numbers.

Understanding Prime Numbers

1. What This Calculator Measures

This calculator checks whether a whole number has exactly two factors: 1 and itself.

2. How the Calculation Works

It first removes obvious composite numbers using small divisibility tests, then uses BigInt Miller-Rabin testing so very large integers are not rounded by JavaScript number precision.

3. Formula or Rule Used

A number n is prime when no divisor other than 1 and n can divide it exactly.

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