DragonFly On-Line Manual Pages

FACTOR(6)                   DragonFly Games Manual                   FACTOR(6)

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

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

DESCRIPTION
     The factor utility will factor positive integers.  When a number is fac-
     tored, 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
     `+'.  Numbers are terminated by a non-digit character (such as a new-
     line).  After a number is read, it is factored.

     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 the maximum.  The default and maximum value of
     stop is 4294967295 on 32-bit architectures and 18446744073709551615 on
     64-bit ones.

     When the primes utility is invoked with no arguments, start is read from
     standard input and stop is taken to be the maximum.  The start value may
     be preceded by a single `+'.  The start value is terminated by a non-
     digit character (such as a newline).

DIAGNOSTICS
     negative numbers aren't permitted
     illegal numeric format
     start value must be less than stop value
     Result too large

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

DragonFly 3.5                  October 10, 2002                  DragonFly 3.5