Prime gap calculator

Client

Gap to the next prime after a given prime n.

4

Nearby workflows on Toolcore

  • Next prime number — Smallest prime strictly greater than n. when units or numeric output should be checked on a related calculator.
  • Previous prime number — Largest prime strictly less than n. when units or numeric output should be checked on a related calculator.
  • Prime number checker — Test whether a whole number is prime—BigInt trial division in your browser, no upload. when units or numeric output should be checked on a related calculator.
  • Semiprime checker — Test whether n is a product of exactly two primes. when units or numeric output should be checked on a related calculator.

About this tool

Enter a prime to see how far until the next prime.

Common use cases

  • Prime gap calculator for quick local checks without uploading data.
  • Copy results into tickets, docs, or classroom notes.

Common mistakes to avoid

  • Unexpected input shape

    See the intro and how-to notes for accepted formats.

FAQ

Is processing local?

Yes—this runs entirely in your browser.

Agent prefill?

Use q or qb for the main text field when supported.

More tools

Related utilities you can open in another tab—mostly client-side.