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factor command in Linux with examples

  • Last Updated : 15 May, 2019

The factor command in Linux is used to print the prime factors of the given numbers, either given from command line or read from standard input.

The numbers given through standard input may be delimited by tabs, spaces or newlines.


factor [NUMBER]
  • Factor 100 (non-prime number):
    prime factors of 100
    We get the prime factors 2 and 5 that make up 100.
  • Factor 13 (prime number itself) :
    prime factors of 13
  • Factor of 221 (product of two primes) :
    Prime factor of 221

    Under the hood, the factor command uses the Pollard-Brent rho algorithm to find out the prime factors.

  • factor --help : This command only supports a few numbers of options, that is its help command and version number.
    Factor help command
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