From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Emanuel Berg Newsgroups: gmane.emacs.help Subject: Re: The next exercise Date: Fri, 09 Dec 2022 22:27:42 +0100 Message-ID: <87a63wuv1t.fsf@dataswamp.org> References: <87tu24tmv6.fsf@web.de> <574c1ceba8d5f62d3c07@heytings.org> <87edt8tklz.fsf@web.de> <574c1ceba8ee790f5f45@heytings.org> <87r0x8s3le.fsf@web.de> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="18683"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:pbRxF/hbyzJYrPM7aIM7uQo3KGM= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Sat Dec 10 11:07:33 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 1p3wlY-0004gA-Il for geh-help-gnu-emacs@m.gmane-mx.org; Sat, 10 Dec 2022 11:07:32 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1p3wlO-0000DX-LM; Sat, 10 Dec 2022 05:07:22 -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 1p3kwX-0007yO-QG for help-gnu-emacs@gnu.org; Fri, 09 Dec 2022 16:30:05 -0500 Original-Received: from ciao.gmane.io ([116.202.254.214]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1p3kwW-0000wM-4J for help-gnu-emacs@gnu.org; Fri, 09 Dec 2022 16:30:05 -0500 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1p3kwU-0009Nt-GO for help-gnu-emacs@gnu.org; Fri, 09 Dec 2022 22:30:02 +0100 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Mail-Copies-To: never Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: -15 X-Spam_score: -1.6 X-Spam_bar: - X-Spam_report: (-1.6 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.25, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Sat, 10 Dec 2022 05:07:21 -0500 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:141556 Archived-At: Michael Heerdegen wrote: >> M-: (expt 1001 1000) RET > > Wow, Tomas and Gregory, thanks for the hint - I had > forgotten that even "normal" Emacs Lisp can do it > exactly. Wonderful. > > (substring (number-to-string (expt 10001 10000)) 0 4) is too > much, however (Arithmetic overflow error). What is this then (defalias '** #'expt) (1- (** 2 (* 8 (** (** 2 10) 4)))) It's an arithmetic overflow error! But what does it express? Hint: Start with (** 2 10) ... -- underground experts united https://dataswamp.org/~incal