Sieve
Prime factors · 30 levels
Divide whole rows and columns until every tile is 1.
How to play
- Pick a prime key (÷2, ÷3, ÷5, ÷7), then tap a row or column arrow.
- Every tile in that line that divides evenly by the key is divided by it. The others stay the same.
- Turn every tile into 1. Each key has only a few uses, so choose your lines wisely!
Key selection stays active when tapped again. When a key runs out, the next available prime is selected automatically. Break each number into primes first: 12 = 2 × 2 × 3 needs two ÷2s and one ÷3 through its row or column.
Teeter, Tint and Echo Heist are free starters. Other games unlock through earned game choices or permanent packs. Your progress stays in the browser; optional sign-in saves it to your website account.