Step 1 of 4 · What's a prime?
Tap each number. A prime has only two factors: 1 and itself. A composite has more.
2PRIME
3PRIME
4COMPOSITE
5PRIME
6COMPOSITE
7PRIME
8COMPOSITE
9COMPOSITE
10COMPOSITE
11PRIME
Tap a chip above to see its factor pairs.
Step 2 of 4 · Factor tree for 12
Prime factorize 12
Break 12 into a product of two factors. Keep going until every leaf is prime.
12 = 2 × 2 × 3 = 2² × 3
Step 3 of 4 · Factor tree for 60
Prime factorize 60
There's more than one way to split — but you always end up with the same prime factors.
60 = 2 × 2 × 3 × 5 = 2² × 3 × 5
Step 4 of 4 · Your turn
Prime factorize 24
Pick a prime that divides the current value. Keep going until the quotient is itself prime.
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Nice work!
You factorized them all.