rayo's number

Questions

What does rayo's number mean?

The smallest number bigger than any finite number named by an expression in the language of set theory with a googol symbols or less.

Where does rayo's number come from?

Named after Agustín Rayo.

How to pronounce rayo's number

1. Open the pronunciation page — Open the Speakur entry for “rayo's number”.
2. Read the phonetic spelling — Read the IPA spelling () so you know which sounds to aim for.
3. Play the audio — Click Play to hear reference audio for “rayo's number”.
4. Repeat and practice — Say “rayo's number” aloud, matching stress and vowels until it feels natural.