Empty your hand before anyone else.
Primes go down any time. Composites only once their prime factors are on the table. Wild cards, skips, and up to six players, online or against the computer.
Play the computer
Choose 1 to 5 opponents and how strong each one is.
Play online
Create a room, share the code, and fill empty seats with bots if you like.
or join
How to play Prime Time
Prime Time is a card game about prime numbers and prime factors for 2 to 6 players, aged about 8 and up. It is free and runs in any phone or desktop browser, with no download or sign-up.
- Primes go down any time. 2, 3, 5, 7, 11 and the other primes up to 59 can be played on any turn.
- Composites need their factors first. 12 is 2 × 2 × 3, so it needs two 2s and a 3 on the table. 49 needs two 7s.
- Magic and Skip. Magic becomes any prime you pick. Skip makes an opponent miss a turn.
- Stuck? Draw a card and pass. The first player with an empty hand wins, and everyone else scores what is left in their hand.
Good for practising prime factorisation at home or in class: every composite you play is a little factor tree.
Enjoying the game? Support it here.
Prime Time™ is a board game by Logicology. Get a copy for the table.