Re: Losing my mind: results change with/without printf() statements

From	Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups	comp.lang.c
Subject	Re: Losing my mind: results change with/without printf() statements
Date	2021-07-02 15:21 +0100
Organization	A noiseless patient Spider
Message-ID	<87a6n4hk4c.fsf@bsb.me.uk> (permalink)
References	<vW0DI.53$h45.18@fx16.iad> <sbi84p$ajn$1@dont-email.me> <Yg2DI.3867$mR.1082@fx33.iad> <hY2DI.505463$N5n7.405017@fx05.ams4> <Gi4DI.1867$t64.414@fx13.iad>

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DFS <nospam@dfs.com> writes:

> Not bad numbers for python and F(10^7), but this code is part of me
> trying to solve Project Euler 413, which asks for F(10^19).

I didn't know that.  As you say, a different algorithm is called for.

(My best naive version gets F(10^9) in 4m21.489s and F(10^7) in 2.177s.)

-- 
Ben.

Thread

Losing my mind: results change with/without printf() statements DFS <nospam@dfs.com> - 2021-06-30 12:26 -0400
  Re: Losing my mind: results change with/without printf() statements David Brown <david.brown@hesbynett.no> - 2021-06-30 19:03 +0200
    Re: Losing my mind: results change with/without printf() statements DFS <nospam@dfs.com> - 2021-06-30 13:58 -0400
      Re: Losing my mind: results change with/without printf() statements Bart <bc@freeuk.com> - 2021-06-30 19:44 +0100
        Re: Losing my mind: results change with/without printf() statements DFS <nospam@dfs.com> - 2021-06-30 16:16 -0400
          Re: Losing my mind: results change with/without printf() statements Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-07-01 00:03 +0100
            Re: Losing my mind: results change with/without printf() statements DFS <nospam@dfs.com> - 2021-06-30 23:54 -0400
              Re: Losing my mind: results change with/without printf() statements David Brown <david.brown@hesbynett.no> - 2021-07-01 10:56 +0200
              Re: Losing my mind: results change with/without printf() statements Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-07-01 10:38 +0100
                Re: Losing my mind: results change with/without printf() statements Michael S <already5chosen@yahoo.com> - 2021-07-02 02:49 -0700
                Re: Losing my mind: results change with/without printf() statements Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-07-02 14:44 +0100
                Re: Losing my mind: results change with/without printf() statements Michael S <already5chosen@yahoo.com> - 2021-07-02 07:48 -0700
                Re: Losing my mind: results change with/without printf() statements Michael S <already5chosen@yahoo.com> - 2021-07-02 09:25 -0700
                Re: Losing my mind: results change with/without printf() statements Bart <bc@freeuk.com> - 2021-07-02 18:33 +0100
                Re: Losing my mind: results change with/without printf() statements Michael S <already5chosen@yahoo.com> - 2021-07-04 01:27 -0700
                Re: Losing my mind: results change with/without printf() statements Bart <bc@freeuk.com> - 2021-07-04 15:19 +0100
                Re: Losing my mind: results change with/without printf() statements Michael S <already5chosen@yahoo.com> - 2021-07-04 09:04 -0700
                Re: Losing my mind: results change with/without printf() statements Michael S <already5chosen@yahoo.com> - 2021-07-04 09:51 -0700
          Re: Losing my mind: results change with/without printf() statements Michael S <already5chosen@yahoo.com> - 2021-07-02 03:20 -0700
            Re: Losing my mind: results change with/without printf() statements Bart <bc@freeuk.com> - 2021-07-02 11:42 +0100
              Re: Losing my mind: results change with/without printf() statements Michael S <already5chosen@yahoo.com> - 2021-07-02 04:47 -0700
          Re: Losing my mind: results change with/without printf() statements Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-07-02 15:21 +0100
            Re: Losing my mind: results change with/without printf() statements DFS <nospam@dfs.com> - 2021-07-02 11:37 -0400
            Re: Losing my mind: results change with/without printf() statements Bart <bc@freeuk.com> - 2021-07-02 17:06 +0100
            Re: Losing my mind: results change with/without printf() statements Kaz Kylheku <563-365-8930@kylheku.com> - 2021-07-02 17:41 +0000
              Re: Losing my mind: results change with/without printf() statements Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-07-02 19:09 +0100
                Re: Losing my mind: results change with/without printf() statements Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-07-02 19:48 +0100
                Re: Losing my mind: results change with/without printf() statements Michael S <already5chosen@yahoo.com> - 2021-07-04 03:21 -0700
                Re: Losing my mind: results change with/without printf() statements Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-07-04 14:01 +0100
                Re: Losing my mind: results change with/without printf() statements Michael S <already5chosen@yahoo.com> - 2021-07-05 02:44 -0700
                Re: Losing my mind: results change with/without printf() statements Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-07-05 14:43 +0100
                Re: Losing my mind: results change with/without printf() statements kegs@provalid.com (Kent Dickey) - 2021-07-05 19:42 -0500
                Re: Losing my mind: results change with/without printf() statements Michael S <already5chosen@yahoo.com> - 2021-07-06 03:36 -0700
                Re: Losing my mind: results change with/without printf() statements kegs@provalid.com (Kent Dickey) - 2021-07-06 12:27 -0500
                Re: Losing my mind: results change with/without printf() statements Michael S <already5chosen@yahoo.com> - 2021-07-06 16:02 -0700
                Re: Losing my mind: results change with/without printf() statements DFS <nospam@dfs.com> - 2021-07-06 20:30 -0400
                Re: Losing my mind: results change with/without printf() statements Michael S <already5chosen@yahoo.com> - 2021-07-08 01:02 -0700
                Re: Losing my mind: results change with/without printf() statements Michael S <already5chosen@yahoo.com> - 2021-07-09 05:52 -0700
                Re: Losing my mind: results change with/without printf() statements kegs@provalid.com (Kent Dickey) - 2021-07-09 08:24 -0500
                Re: Losing my mind: results change with/without printf() statements Michael S <already5chosen@yahoo.com> - 2021-07-09 07:20 -0700
                Re: Losing my mind: results change with/without printf() statements Michael S <already5chosen@yahoo.com> - 2021-07-10 15:27 -0700
                Re: Losing my mind: results change with/without printf() statements Michael S <already5chosen@yahoo.com> - 2021-07-12 00:56 -0700
                Re: Losing my mind: results change with/without printf() statements Michael S <already5chosen@yahoo.com> - 2021-07-12 12:01 -0700
                Re: Losing my mind: results change with/without printf() statements Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-07-12 21:30 +0100
                Re: Losing my mind: results change with/without printf() statements Michael S <already5chosen@yahoo.com> - 2021-07-13 00:33 -0700
                Re: Losing my mind: results change with/without printf() statements Ben Bacarisse <ben.usenet@bsb.me.uk> - 2021-07-13 22:58 +0100
                Re: Losing my mind: results change with/without printf() statements Michael S <already5chosen@yahoo.com> - 2021-07-20 13:38 -0700
                Re: Losing my mind: results change with/without printf() statements DFS <nospam@dfs.com> - 2021-07-09 11:23 -0400
                Re: Losing my mind: results change with/without printf() statements Michael S <already5chosen@yahoo.com> - 2021-07-09 08:43 -0700
                Re: Losing my mind: results change with/without printf() statements Mike Terry <news.dead.person.stones@darjeeling.plus.com> - 2021-07-11 16:40 +0100
                Re: Losing my mind: results change with/without printf() statements Michael S <already5chosen@yahoo.com> - 2021-07-12 02:51 -0700
                Re: Losing my mind: results change with/without printf() statements Mike Terry <news.dead.person.stones@darjeeling.plus.com> - 2021-07-12 16:57 +0100
                Re: Losing my mind: results change with/without printf() statements Mike Terry <news.dead.person.stones@darjeeling.plus.com> - 2021-07-12 17:25 +0100
                Re: Losing my mind: results change with/without printf() statements Mike Terry <news.dead.person.stones@darjeeling.plus.com> - 2021-07-20 18:03 +0100
      Re: Losing my mind: results change with/without printf() statements David Brown <david.brown@hesbynett.no> - 2021-07-01 10:46 +0200
        Re: Losing my mind: results change with/without printf() statements DFS <nospam@dfs.com> - 2021-07-02 11:52 -0400
          Re: Losing my mind: results change with/without printf() statements Bart <bc@freeuk.com> - 2021-07-02 17:16 +0100
            Re: Losing my mind: results change with/without printf() statements DFS <nospam@dfs.com> - 2021-07-02 13:27 -0400
      Re: Losing my mind: results change with/without printf() statements luser droog <luser.droog@gmail.com> - 2021-07-12 16:19 -0700
  Re: Losing my mind: results change with/without printf() statements Barry Schwarz <schwarzb@delq.com> - 2021-06-30 11:36 -0700
    Re: Losing my mind: results change with/without printf() statements DFS <nospam@dfs.com> - 2021-06-30 16:03 -0400
      Re: Losing my mind: results change with/without printf() statements Barry Schwarz <schwarzb@delq.com> - 2021-06-30 13:22 -0700
      Re: Losing my mind: results change with/without printf() statements David Brown <david.brown@hesbynett.no> - 2021-07-01 11:03 +0200
  Re: Losing my mind: results change with/without printf() statements Rosario19 <Ros@invalid.invalid> - 2021-07-01 10:49 +0200

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