15001st
15001st refers to the ordinal number representing the position immediately following the 15000th. It signifies the order of something in a sequence, indicating that it is the fifteen thousand and first item. This designation is commonly used in lists, rankings, serial numbers, or any enumeration where items are placed in a specific order. For example, in a list of participants in a large event, the person designated as 15001st would be the one who registered or arrived immediately after the 15000th person. The number itself, 15001, is a positive integer. The "-st" suffix is the standard English grammatical indicator for ordinal numbers ending in one (except for eleventh, twenty-first, etc.).