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124 lines
4.1 KiB
Groff
124 lines
4.1 KiB
Groff
.\" Copyright (c) 1989, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" Landon Curt Noll.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)factor.6 8.1 (Berkeley) 5/31/93
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.\"
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.\" $FreeBSD$
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.\"
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.\" By: Landon Curt Noll chongo@toad.com, ...!{sun,tolsoft}!hoptoad!chongo
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.\"
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.\" chongo <for a good prime call: 391581 * 2^216193 - 1> /\oo/\
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.\"
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.TH FACTOR 6 "Jan 7, 1999"
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.UC 7
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.SH NAME
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factor, primes \- factor a number, generate primes
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.SH SYNOPSIS
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.B factor
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-[h] [ number ] ...
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.PP
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.B primes
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-[h] [ start [ stop ]]
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.SH DESCRIPTION
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The
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.I factor
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utility will factor integers between 0 and ULONG_MAX (4294967295 on 32
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bit architectures, 18446744073709551615 on 64 bit ones), inclusive.
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When a number is factored, it is printed, followed by a ``:'',
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and the list of factors on a single line.
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Factors are listed in ascending order, and are preceded by a space.
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If a factor divides a value more than once, it will be printed
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more than once.
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.PP
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When
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.I factor
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is invoked with one or more arguments,
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each argument will be factored.
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.PP
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When
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.I factor
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is invoked with no arguments,
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.I factor
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reads numbers, one per line, from standard input, until end of file or error.
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Leading white-space and empty lines are ignored.
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Numbers may be preceded by a single - or +.
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Numbers are terminated by a non-digit character (such as a newline).
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After a number is read, it is factored.
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Input lines must not be longer than 255 characters.
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.PP
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The
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.I primes
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utility prints primes in ascending order, one per line, starting at or above
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.B start
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and continuing until, but not including
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.B stop.
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The
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.B start
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value must be at least 0 and not greater than
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.B stop.\&
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The
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.B stop
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value must not be greater than 4294967295.
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The default value of
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.B stop
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is 4294967295.
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.PP
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When the
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.I primes
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utility is invoked with no arguments,
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.B start
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is read from standard input.
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.B Stop
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is taken to be 4294967295.
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The
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.B start
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value may be preceded by a single +.
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The
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.B start
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value is terminated by a non-digit character (such as a newline).
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The input line must not be longer than 255 characters.
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.SH OPTIONS
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.LP
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.TP 8
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.B \-h
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Print the results in hexadecimal rather than decimal.
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.SH DIAGNOSTICS
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Out of range or invalid input results in `ouch' being
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written to standard error.
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.SH BUGS
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.I Factor
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cannot handle the ``10 most wanted'' factor list,
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.I primes
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won't get you a world record.
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