Agreed! The numbers are the Alexander-Briggs identifiers for the prime knots: - The big number is the number of crossings. - The subscript is its officially

Agreed! The numbers are the Alexander-Briggs identifiers for the prime knots: - The big number is the number of crossings. - The subscript is its officially designated index within the set of knots that have the same number of crossings. - If there's a superscript, then it's a link, and the superscript represents the number of components.