How to find all occurrences of numbers?

Question

Regular Expressions

It is required to compose a regular number to search for a number consisting of a certain number of digits, for example, 5 digits, no more no less
Example_1: "id = 111; //comment" result = no match
Example_2: "var a = 11122; //comment" result = "11122"
Example_3: "reg = 11122555; //comment" result = no match
Tried ([\d]{19}) but then example 3 also falls under this regsp

Answer 1

regexr.com/3ccva