Reply To: GREP to avoid long number figures to split?

David suggested a GREP style, so it gets applied automatically (or perhaps automagically) when and where necessary. The character style would only need the “no break” attribute selected.

If you want to search-and-replace, you can still use a character style (with No Break) so you can find/change it later on, or just set “No Break” in the Change Formatting box.

Don't use the first option if you may already have used character styles for formatting the numbers. This new replace-op will remove the former formatting style.

Don't use the second option if you have a strong dislike of the “Paragraph +”, as it only applies the No Break in the volatile 'local' way.

GREP Styles have neither of these disadvantages, plus (the biggest one of all) they get automatically applied and removed where and when necessary. All in all, if you have CS4 or newer, GREP styles are the best.