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31 .\" @(#)factor.6 8.1 (Berkeley) 5/31/93
33 .\" $FreeBSD: src/games/factor/factor.6,v 1.5.2.3 2003/01/26 02:54:56 keramida Exp $
34 .\" $DragonFly: src/games/factor/factor.6,v 1.3 2005/08/05 22:35:10 swildner Exp $
36 .\" By: Landon Curt Noll chongo@toad.com, ...!{sun,tolsoft}!hoptoad!chongo
38 .\" chongo <for a good prime call: 391581 * 2^216193 - 1> /\oo/\
46 .Nd factor a number, generate primes
53 .Op Ar start Op Ar stop
57 utility will factor positive integers.
58 When a number is factored, it is printed, followed by a
60 and the list of factors on a single line.
61 Factors are listed in ascending order, and are preceded by a space.
62 If a factor divides a value more than once, it will be printed more than once.
66 is invoked with one or more arguments, each argument will be factored.
70 is invoked with no arguments,
72 reads numbers, one per line, from standard input, until end of file or error.
73 Leading white-space and empty lines are ignored.
74 Numbers may be preceded by a single
76 Numbers are terminated by a non-digit character (such as a newline).
77 After a number is read, it is factored.
81 utility prints primes in ascending order, one per line, starting at or above
83 and continuing until, but not including
87 value must be at least 0 and not greater than
91 value must not be greater than the maximum.
92 The default and maximum value of
94 is 4294967295 on 32-bit architectures
95 and 18446744073709551615 on 64-bit ones.
99 utility is invoked with no arguments,
101 is read from standard input and
103 is taken to be the maximum.
106 value may be preceded by a single
110 value is terminated by a non-digit character (such as a newline).
113 .It "negative numbers aren't permitted"
114 .It "illegal numeric format"
115 .It "start value must be less than stop value"
116 .It "Result too large"
124 will not get you a world record.