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FACTOR(6)                      BSD Games Manual                      FACTOR(6)

NAME
     factor, primes -- factor a number, generate primes

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

DESCRIPTION
     The factor utility will factor 64-bit positive integers.  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.  White-space and
     empty lines are ignored.  Numbers may be preceded by a single +.  After a
     number is read, it is factored.  Input lines must not be longer than 99
     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 input line must not be longer than 99 char-
     acters.

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

BSD                            January 24, 2011                            BSD