Prime Number Calculator

The Prime Number Calculator lets you do two powerful things: check if a number is prime, or generate a list of all prime numbers within a given range. Whether you’re working on a math assignment, coding project, or building a quiz, this tool gives you clean, fast results right in your browser.

You can toggle between check mode and generate mode, format the output the way you like, and get instant visual feedback on every change.

How to Use:

You can use this tool in two modes:

• Prime Check Mode (default):
  Enter a number per line in the Input Numbers box. For example: Copy code7 28 97 Output will show whether each number is prime or not. You can toggle:
  • Show verdict to display results like 97 → Prime
  • Comma-separated not applicable in this mode
• Generate Primes Mode:
  Switch to “Generate Primes” mode using the radio button, and input a range like: Copy code10-50 This will list all primes in that range. Toggle Comma-separated if you want the result in a single line format like 11, 13, 17....

The Convert button triggers output manually, but results also update live as you type. The Copy button grabs the full output and flashes the box for feedback.

What Prime Number Calculator can do:

This tool is perfect for checking primality or building lists of primes. It’s useful for:

• Students learning about prime numbers
• Teachers creating quizzes and problems
• Programmers testing algorithms or inputs
• Anyone who needs to find or verify primes quickly

You get both checking and generation in a single place plus output formatting to fit your needs.

Example:

If you enter:

17  
29  
51  
97

And use Mode: Prime Check with “Show verdict” enabled, the output will be:

17 → Prime  
29 → Prime  
51 → Not prime  
97 → Prime

If you turn “Show verdict” off, you’ll see just:

Prime  
Prime  
Not prime  
Prime

Now switch to Mode: Generate Primes, and enter a range like:

10-30

The tool will return:

11  
13  
17  
19  
23  
29

If you enable “Comma-separated”, the output becomes:

11, 13, 17, 19, 23, 29

This tool is flexible for checking individual values or generating a list of prime numbers in a custom range useful for math homework, number theory, or even coding challenges.

Prime Number Calculator Table:

Below are examples of both modes common primes, non-primes, and generation ranges.

Common Use Cases:

Use this tool to quickly verify if a number is prime or generate a prime list for study, algorithm testing, or puzzle creation. It’s quick, flexible, and handles both tasks in one interface. Whether you’re a student or a software dev, this tool will speed things up.