Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.7 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_MED,SPF_PASS,SUBJ_ALL_CAPS,T_DKIM_INVALID autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: : mailn 1480; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u1) with ESMTP id v26LdHBV008386 for ; Mon, 6 Mar 2017 22:39:18 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1cl0Hq-0007W6-Bv for rs_out_1@blacksheep.org; Mon, 06 Mar 2017 21:35:22 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1cl0Hm-0007Vx-W9 for rsgb_lf_group@blacksheep.org; Mon, 06 Mar 2017 21:35:18 +0000 Received: from porthos.netcom.co.uk ([217.72.171.73]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1cl0Hk-00018l-Bg for rsgb_lf_group@blacksheep.org; Mon, 06 Mar 2017 21:35:17 +0000 X-DKIM-Result: Domain=abelian.org Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=abelian.org ; s=default; h=Content-Transfer-Encoding:Content-Type:In-Reply-To: MIME-Version:Date:Message-ID:From:To:References:Reply-To:Subject:Sender:Cc: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=GRmMxz9eK183tBO1kRwamYnGjkG1XcQRxMpmDXvHZOY=; b=ZSdEv1jk1UDoy8FJf6LWExAZk5 TKzMFlh8Gld/w32qzYOiO6x7wL/OP1s3mTtRJKqQLY9e8hd1xXvXYg08x0YBXYkpKX08ZFPZextGH wz2HWEWl+97eWudVELK7gA+p6ra38+KBJcwtj8DmNdU5ODp9jqr/4JFZ7cohZZG8qSk8=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:47291 helo=pn.abelian.org) by porthos.netcom.co.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.88) (envelope-from ) id 1cl0Hj-0001cG-Uo for rsgb_lf_group@blacksheep.org; Mon, 06 Mar 2017 21:35:16 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id 4BE2F400159 for ; Mon, 6 Mar 2017 21:35:15 +0000 (UTC) References: <58B34590.3030802@posteo.de> <58B34924.6060005@posteo.de> <81b61b29-0b37-3e1c-1a42-f9153a1c7870@abelian.org> To: rsgb_lf_group@blacksheep.org From: Paul Nicholson Message-ID: <505d2471-2174-612c-7b1e-695f26d0f841@abelian.org> Date: Mon, 6 Mar 2017 21:35:15 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 MIME-Version: 1.0 In-Reply-To: X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - porthos.netcom.co.uk X-AntiAbuse: Original Domain - blacksheep.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - abelian.org X-Get-Message-Sender-Via: porthos.netcom.co.uk: authenticated_id: catchall@abelian.org X-Authenticated-Sender: porthos.netcom.co.uk: catchall@abelian.org X-Scan-Signature: 0a4643e586472c13187d293ec5d096c2 Subject: Re: VLF: 16K19A? Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Scanned-By: MIMEDefang 2.75 Status: RO X-Status: X-Keywords: X-UID: 10799 The search for a good rate 1/16 K=19 code continues without success. I improved the code search program. It examines 2 million polynomials per CPU second. After some hundreds of CPU hours it finds about 80,000 potential codes and these go for further testing. Some of these look quite good, 96 of them have minimum distance equal to the Heller bound. But strangely none perform better than 8K19A when using long lists (eg 500k list size). Several do better than 8K19A but only up to list length of 10 or so. Perhaps there is some subtle mistake in the program? So I tested the search program on rate 1/8 K=19 and it soon produced several new good codes, one of which is consistently better than 8K19A at all list lengths. So something strange is going on. I didn't have this difficulty with the stronger codes. The more I learn about this subject, the less I seem to know. Something I don't understand is happening here. -- Paul Nicholson --