Prime Number Sprint
Classify randomly generated integers as prime or composite.
Play Prime Number Sprint
Judge twenty numbers; 1 is excluded from the challenge.
How to use Prime Number Sprint
Judge twenty numbers; 1 is excluded from the challenge. All gameplay and calculations run in the browser; there is no mandatory account, game API or score upload.
What this challenge measures
Number of correct classifications. This result describes performance in this specific exercise; it should not be interpreted as a population ranking.
How to improve with practice
Repeat attempts under similar conditions, compare with your own recent sessions, and favor consistent accuracy over isolated personal records. For fair comparisons keep the same browser, input method and device when possible.
Accuracy and limitations
Only modest positive integers are presented. Paused tabs, varying display refresh rates and browser scheduling can also affect time-sensitive exercises. Browser-local history can be cleared by the visitor at any time.
Frequently asked questions
Is Prime Number Sprint free?
Yes. You can use it without signing in or paying.
How do I use Prime Number Sprint?
Judge twenty numbers; 1 is excluded from the challenge.
What does Prime Number Sprint report?
Number of correct classifications.
Are scores scientifically or medically certified?
No. Only modest positive integers are presented.