About Factorflare: Prime Rescue
A lantern festival has mixed prime and composite numbers. Use prime-factor keys to sweep away composite lanterns while keeping every prime glowing. Inspect numbers for factor clues, find efficient sweep combinations, and rescue the festival across 60 levels in each of three difficulties. A tactile 3D number sieve with undo, sound, and saved stars.
How to Play Factorflare: Prime Rescue
Choose a factor key to extinguish its multiples, except the prime factor itself. Your goal is to remove every composite number and leave all primes glowing. Tap a lantern or its number button to inspect its factorization. The factor buttons show how many remaining lanterns they affect. Keys 1 through 6 trigger the corresponding factor button. Easy uses factors 2, 3, and 5; Medium adds 7; Hard adds 11 and 13 with larger numbers. Play 60 levels per difficulty, try to use the fewest sweeps, undo a sweep, or use Hint for an efficient next sweep. Reset restores the festival. Tap the musical note to mute.