[1] 32進数にも色々あります。

[2]

RFC 2938 Base32
RFC 4648 Base32
z-base-32
Safe32

[3]

三十二進法 - Wikipedia (2016-10-31 12:57:17 +09:00) https://ja.wikipedia.org/wiki/%E4%B8%89%E5%8D%81%E4%BA%8C%E9%80%B2%E6%B3%95

自然言語では、コンゴ民主共和国のンギティ語(英語版)[2]が三十二進法の数詞を持つ[3]。内部に四進法を含み、減算も用いる複雑な体系である。

[7] Base 32, Douglas Crockford, 2020-12-25T17:41:33.000Z, 2020-12-29T08:35:51.769Z https://www.crockford.com/base32.html

[4] draft-multiformats-multibase-02 - The Multibase Data Format, 2020-12-21T02:06:34.000Z, 2020-12-29T05:52:41.555Z https://tools.ietf.org/html/draft-multiformats-multibase-02

[5] Check alphabets for base32 · Issue #4 · multiformats/multibase · GitHub, 2020-12-29T08:35:08.000Z https://github.com/multiformats/multibase/issues/4

[6] How to implement a DNSCurve cache, 2017-01-22T18:18:38.000Z, 2020-12-29T08:35:32.496Z https://dnscurve.org/in-implement.html

[8] bips/bip-0173.mediawiki at master · bitcoin/bips · GitHub, 2020-12-29T09:15:42.000Z https://github.com/bitcoin/bips/blob/master/bip-0173.mediawiki

[9] Clockwork Base32

[10] Clockwork Base32: A variant of Base32 inspired by Crockford's Base32 · GitHub, 2022-11-20T14:55:34.000Z https://gist.github.com/szktty/228f85794e4187882a77734c89c384a8
[11] Base32 の変種を作った話. あまり大層な話ではないんですが、諸事情により Clockwork Base32… | by SUZUKI Tetsuya | shiguredo | Medium, SUZUKI Tetsuya, 2022-11-20T14:55:43.000Z https://medium.com/shiguredo/base32-%E3%81%AE%E5%A4%89%E7%A8%AE%E3%82%92%E4%BD%9C%E3%81%A3%E3%81%9F%E8%A9%B1-d8da2e3102ec