Have you ever wondered, "What prime is it?"

Consider the current time in 24-hour format, but without the colon, so that it's a number. Then consider the closest prime number. Time Primes displays that on the screen.

Background colors indicate type of prime.

Learn about the different types of prime!

Share your favorites!

What’s New

Version 3.1

Expanded sharing capabilities

App Privacy

The developer, Max Margolis, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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