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From: Michael Heerdegen <michael_heerdegen@web.de>
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Subject: Re: The next exercise
Date: Fri, 09 Dec 2022 21:51:25 +0100
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Gregory Heytings <gregory@heytings.org> writes:

> 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).

Michael.