From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Gregory Heytings Newsgroups: gmane.emacs.help Subject: Re: The next exercise Date: Fri, 09 Dec 2022 19:44:39 +0000 Message-ID: <574c1ceba8d5f62d3c07@heytings.org> References: <87tu24tmv6.fsf@web.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="4793"; mail-complaints-to="usenet@ciao.gmane.io" Cc: help-gnu-emacs@gnu.org To: Michael Heerdegen Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Fri Dec 09 20:45:01 2022 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1p3jIq-00013D-Nx for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 09 Dec 2022 20:45:00 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1p3jIf-0004i3-BW; Fri, 09 Dec 2022 14:44:49 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1p3jIe-0004hs-GL for help-gnu-emacs@gnu.org; Fri, 09 Dec 2022 14:44:48 -0500 Original-Received: from heytings.org ([95.142.160.155]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1p3jIa-0001SV-KJ for help-gnu-emacs@gnu.org; Fri, 09 Dec 2022 14:44:47 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=heytings.org; s=20220101; t=1670615080; bh=BC63dkBFgZHcPGXro95LE4EFrY+XRQ0x/ygLQGWmcAs=; h=Date:From:To:cc:Subject:In-Reply-To:Message-ID:References:From; b=BH3OCOdk/cPtV1yMfJhwHGAER9oSHMro0ningHCKLaV+jBOg8UR4VPak6HLRFF2rA s+oLyeyQJZtJz4y8XtygVhO/bmSfdGX4XndBT9kF4PcMwrsuYoC/cbo32CA4XHUWsJ d5uKndVYpVIWTW9D2WaerexJp0SfyxMx5qZcDVVR45M4wbQwpp+3RVw6hGr6Itzj5s fpJgCt+GI/iHqujx9WFzzphFT5wrhr5uVX9trdW42Xx7MC2FCP1kP6E+fU/By97J3e +YyeFByUa51sqC1DO6G0pLX5N5ppubPIdin4mMHs/MFnkKwz7OLbSu0GKXep4LuDNq 36S1aSFmLWBHA== In-Reply-To: <87tu24tmv6.fsf@web.de> Received-SPF: pass client-ip=95.142.160.155; envelope-from=gregory@heytings.org; helo=heytings.org X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.help:141524 Archived-At: > > Hello, > > my exercise for today is something I stumbled across a few days ago but > that is very nice: Answer with only using Emacs (or maybe your school > knowledge?): > > The first three decimal digits (from the left) of 1001^1000 - i.e. one > thousand and one to the one thousand's power, > > 1001*1001*...*1001 > \________________/ > ^ > 1000 factors > > are of course: > > (a) 2 7 1, the first three digits of Euler's number e > > (b) 3 1 4, the first three digits of the mathematical constant pi > > (c) 1 0 0, or > > (d) none of these > > What's your choice? How would you solve this using Emacs (or maybe even > without)? > M-: (substring (number-to-string (expt 1001 1000)) 0 3) RET "271"