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 64bit 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. Whitespace 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
