FACTOR(6)

NAME
     factor, primes - factor a number, generate primes

SYNOPSIS
     factor [number ...]
     primes [start [stop]]

DESCRIPTION
     The factor utility will factor integers between -2147483648 and
     2147483647 inclusive.  When a number is factored, it is printed, followed
     by a ``:'', and the list of factors on a single line.  Factors are listed
     in ascending order, and are preceded by a space.  If a factor divides a
     value more than once, it will be printed more than once.

     When factor is invoked with one or more arguments, each argument will be
     factored.

     When factor is invoked with no arguments, factor reads numbers, one per
     line, from standard input, until end of file or error.  Leading white-
     space and empty lines are ignored.  Numbers may be preceded by a single -
     or +.  Numbers are terminated by a non-digit character (such as a new-
     line).  After a number is read, it is factored.  Input lines must not be
     longer than 255 characters.

     The primes utility prints primes in ascending order, one per line, start-
     ing at or above start and continuing until, but not including stop. The
     start value must be at least 0 and not greater than stop. The stop value
     must not be greater than 4294967295.  The default value of stop is
     4294967295.

     When the primes utility is invoked with no arguments, start is read from
     standard input.  stop is taken to be 4294967295.  The start value may be
     preceded by a single +.  The start value is terminated by a non-digit
     character (such as a newline).  The input line must not be longer than
     255 characters.

DIAGNOSTICS
     Out of range or invalid input results in `ouch' being written to standard
     error.

BUGS
     factor cannot handle the ``10 most wanted'' factor list, primes won't get
     you a world record.