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factor(1)                        User Commands                       factor(1)



NAME
       factor - obtain the prime factors of a number

SYNOPSIS
       factor [integer]

DESCRIPTION
       factor  writes  to  standard  input  all prime factors for any positive
       integer less than or equal to 10**14. The prime factors are written the
       proper number of times.

       If  factor  is  used without an argument, it waits for an integer to be
       entered. After entry of the integer, it factors it,  writes  its  prime
       factors the proper number of times, and then waits for another integer.
       factor exits if a 0 or any non-numeric character is entered.

       If factor is invoked with an argument (integer), it writes the integer,
       factors  it  and  writes  all the prime factors as described above, and
       then exits. If the argument is 0 or non-numeric, factor writes a 0  and
       then exits.

       The maximum time to factor an integer is proportional to sqrt(n), where
       n is the integer which is entered. factor will take this time when n is
       prime or the square of a prime.

OPERANDS
       integer         Any positive integer less than or equal to 10**14.



EXIT STATUS
       0        Successful completion.



       1        An error occurred.



DIAGNOSTICS
       factor  prints  the  error  message Ouch! for input out of range or for
       garbage input.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:


       tab()    allbox;    cw(2.750000i)|     cw(2.750000i)     lw(2.750000i)|
       lw(2.750000i).  ATTRIBUTE TYPEATTRIBUTE VALUE AvailabilitySUNWesu


SEE ALSO
       attributes(5)



SunOS 5.10                        31 Jan 1996                        factor(1)