Prime Time
Decide fast: prime numbers one way, composites the other
About Prime Time
Prime Time is a compact PlayMemorize mini-game about number theory fluency. Classify numbers quickly as prime or composite.
How a round works. You decide whether each number has only two factors or can be divided by another whole number. Feedback is immediate, and a new seeded round keeps the puzzle fresh without sending the puzzle state away from your browser.
Age-aware practice. Library links can carry an age band into the game, so the opening difficulty is tuned to the child or grown-up challenge path that launched it.
Embeddable. The Embed tab lets teachers, parents, and writers place either the mini-game or full game on another site. Embed opens are tagged for GA4 attribution while play remains local-first.
Part of PlayMemorize, a passion project from Christoffer De Geer. It runs in the browser and is designed for short, honest practice rounds.
FAQ
-
What does Prime Time train?
Prime Time trains number theory fluency through short rounds with immediate feedback. -
Can I embed Prime Time?
Yes. Open the Embed tab below the game to copy a mini-game iframe or a full-game iframe for another page. -
Does Prime Time work with age filters?
Yes. Age-filtered library links pass the selected band into the game so the first round starts at an appropriate difficulty. -
Why is Prime Time excluded from worksheets for now?
The worksheet registry documents this game as unsupported because the current paper renderer cannot yet preserve the interaction or diagrams that make the browser version fair.