primes!

score0

best0

next

swipe to slide. two equal primes make the next prime. tap a tile to hear it.

v1.1 · 2026-10-07

meet 2

the maths

tap to keep playing

no more moves

score0

highest2

best0

how to play

swipe, or press the arrow keys. every tile slides as far as it can.
two equal primes that meet make the next prime: 2 and 2 make 3, 3 and 3 make 5, 5 and 5 make 7.
after each swipe a new 2 (sometimes a 3) arrives. the small tile by "next" shows which.
the game ends when no swipe can change the board. there is no clock.

scoring: each tile is built from twos. 3 holds two of them, 5 holds four, 7 holds eight, and 37 holds 2,048. a merge scores the twos it gathers.

v1.1 · 2026-10-07

met so far