In Domino, if you search for a string Example 42023, documents containing Exact match 42023 and documents containing "000 42023"(With Space) will be found by full text search.
Documents containing string 00042023( without space) will not be found by full text search. As with string 00042023, the GTR indexer thinks of that it is a "whole word" hence it will not hit 42023. When you are searching with number search engine will check for exact matching number used for the search.
In such scenarios search needs to be performed using *42023 to search the documents.
Please add an option to search for documents such a way if search for string 42023 is performed then exact matching string as well as other documents containing 00042023 string will be found by full Text search.