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     factor(1)                                               factor(1)



     NAME
          factor - factor a number

     SYNOPSIS
          factor [number]

     DESCRIPTION
          factor prints the prime factors of its argument.  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
          256 (about 7.2e16) 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, where n is the
          number being factored.  It takes 1 minute to factor a prime
          near 1011 on a 68020.

     FILES
          /bin/factor

     DIAGNOSTICS
          ouch for input out of range or for garbage input.



























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