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| author | ast <ast@NetBSD.org> | 2014-10-02 21:36:37 +0000 |
|---|---|---|
| committer | ast <ast@NetBSD.org> | 2014-10-02 21:36:37 +0000 |
| commit | 2eb43769534644ef8af78e6a1fa70c755d41200b (patch) | |
| tree | f39dbbb28c3e53e18a61d031583f9cccc1c89416 /factor/factor.6 | |
| parent | d43706be7b336fd46d5a93d300182a17193f5544 (diff) | |
| download | bsdgames-darwin-2eb43769534644ef8af78e6a1fa70c755d41200b.tar.gz bsdgames-darwin-2eb43769534644ef8af78e6a1fa70c755d41200b.zip | |
Imported and adapted from FreeBSD svn r272166 and r272207; this fixes
false positives for products of primes larger than 2^16. For example,
before this commit:
$ /usr/games/primes 4295360521 4295360522
4295360521
but
$ /usr/games/factor 4295360521
4295360521: 65539 65539
or
$ /usr/games/primes 3825123056546413049 3825123056546413050
3825123056546413049
yet
$ /usr/games/factor 3825123056546413049
3825123056546413049: 165479 23115459100831
or
$ /usr/games/primes 18446744073709551577
18446744073709551577
although
$ /usr/games/factor 18446744073709551577
18446744073709551577: 139646831 132095686967
Incidentally, the above examples show the smallest and largest cases that
were erroneously stated as prime in the range 2^32 .. 3825123056546413049
.. 2^64; the primes(6) program now stops at 3825123056546413050 as
primality tests on larger integers would be by brute force factorization.
In addition, special to the NetBSD version:
. for -d option, skip first difference when start is >65537 as it is incorrect
. corrected usage to mention both the existing -d as well as the new -h option
For original FreeBSD commit message by Colin Percival, see:
http://svnweb.freebsd.org/base?view=revision&revision=272166
Diffstat (limited to 'factor/factor.6')
| -rw-r--r-- | factor/factor.6 | 17 |
1 files changed, 6 insertions, 11 deletions
diff --git a/factor/factor.6 b/factor/factor.6 index 32029eca..c36fcb1f 100644 --- a/factor/factor.6 +++ b/factor/factor.6 @@ -1,4 +1,4 @@ -.\" $NetBSD: factor.6,v 1.12 2010/05/15 21:22:39 joerg Exp $ +.\" $NetBSD: factor.6,v 1.13 2014/10/02 21:36:37 ast Exp $ .\" .\" Copyright (c) 1989, 1993 .\" The Regents of the University of California. All rights reserved. @@ -33,9 +33,7 @@ .\" @(#)factor.6 8.1 (Berkeley) 5/31/93 .\" .\" -.\" By: Landon Curt Noll chongo@toad.com, ...!{sun,tolsoft}!hoptoad!chongo -.\" -.\" chongo <for a good prime call: 391581 * 2^216193 - 1> /\oo/\ +.\" By Landon Curt Noll, http://www.isthe.com/chongo/index.html /\oo/\ .\" .Dd May 15, 2010 .Dt FACTOR 6 @@ -88,10 +86,7 @@ is compiled without OpenSSL it is limited to the maximum value of .Vt unsigned long . .Sh DIAGNOSTICS Out of range or invalid input results in -an appropriate error message -being written to standard error. -.\".Sh BUGS -.\".Nm -.\"cannot handle the -.\".Dq 10 most wanted -.\"factor list. +an appropriate error message to standard error. +.Sh AUTHORS +Originally by +.An Landon Curt Noll . |