factor(1)                        DG/UX R4.11                       factor(1)


NAME
       factor - factor a number

SYNOPSIS
       factor [ number ]

   where:
       number An integer from 1 to 100,000,000,000,000

DESCRIPTION
       When factor is invoked without an argument, it waits for a number to
       be typed in.  If you type in a positive number less than 1014 it will
       factor the number and print its prime factors; each one is printed
       the proper number of times.  Then it waits for another number.  It
       exits if it encounters a zero or any non-numeric character.

       If factor is invoked with an argument, it factors the number as above
       and then exits.

       Maximum time to factor is proportional to sqrt(n) and occurs when n
       is prime or the square of a prime.

EXAMPLES
       $ factor 12
       12
            2
            2
            3

       The above command lists the prime factors for the number 12.

DIAGNOSTICS
       The message "Ouch!" is displayed for input out of range or for
       garbage input.

SEE ALSO
       expr(1).


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