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Prime Number Generator
Find and generate lists of prime numbers up to a limit. This tool helps you discover primes, check values, and export lists for cryptographic studies.
✓ Free✓ No signup✓ Privacy first✓ Runs in your browser
How it works
Convert in three steps

1. Set the range limit

Input the minimum and maximum numeric values you want to search.

2. Run the search algorithm

Click compile to scan the range for prime number integers.

3. Save your lists

View the list of primes and copy the output array to your clipboard.

FAQ
Common questions
The tool uses a client-side implementation of the Sieve of Eratosthenes to quickly identify prime numbers within your range. This algorithm is fast and efficient for standard browser-based searches. It allows you to check ranges in milliseconds.
Yes, to prevent your web browser from running out of memory, the search limit is restricted to numbers up to 1,000,000. Running search algorithms past this limit can cause tabs to freeze due to heavy computing loops.
Yes, you can set the start and end values to the same number to check if that single integer is prime. The tool will scan the value and display its prime status and factors.
No, the search logic processes entirely in your browser window. None of your ranges, selected limits, or prime lists are transmitted to external servers, keeping your data private.
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About the Prime Number Generator
The Prime Number Generator is a fast, reliable utility designed for students, cryptographers, and programmers who need to identify prime integers. It offers a clean interface to search ranges without running local programming scripts. Whether teaching division fundamentals or checking security encryption keys, the tool provides quick results.
Benefits
  • Analyze encryption factors - generate prime lists to study the foundation of public key cryptography algorithms.
  • Draft math quizzes - export list ranges of prime numbers to build math handouts for school classrooms.
  • Verify prime status - check single large integers quickly to check if they are divisible by other numbers.
  • Test browser speeds - run large search limits to check how fast your browser computes complex arrays.
Privacy
Calculations are processed entirely within the local web browser, meaning no search limits or generated prime arrays are sent to external servers.