Identify composite numbers and their prime factors.
Input Number
Analysis Results
Yes
Is Composite?
Results showing if the number is composite and its prime decomposition.
Prime Factors2 × 2 × 2 × 3
Factor Count4
2
2
2
3
About this calculator
Quick Reference
PrimeExactly 2 factors
Composite> 2 factors
Unit (1)Exactly 1 factor
What is a Composite Number?
A composite number is a positive integer greater than 1 that has at least one divisor other than 1 and itself. In other words, a composite number is any positive integer greater than 1 that is not prime.
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Pro Tips
The numbers 0 and 1 are neither prime nor composite.
Even numbers greater than 2 are all composite.
Any composite number can be uniquely factored into primes.
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Fun Facts
"The number 4 is the smallest composite number."
"Composite numbers are the 'building blocks' of the world's most secure encryption (RSA)."
"Ancient Greeks called them 'synthetic' numbers."
Formula: n = p₁ × p₂ × ... × pₖ (where p is prime)
