Prime factorization

Break an integer into its prime factors, with divisor count and list.

A whole number from 2 to 1,000,000,000,000,000.

Factored in this browser. Nothing is sent anywhere.

Integers from 2 to 10¹⁵ by trial division — a large prime can take a moment. Negative numbers and decimals are rejected; factor the magnitude and apply the sign yourself.

How to use

  1. Enter an integer from 2 up.
  2. Factorize.
  3. Read the factorization, divisor count, and divisor list.

What it supports

Integers 2 to 10¹⁵ via trial division — a large prime takes a moment. Negative numbers and decimals are rejected.

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