how to add space between two numbers

I have a huge number

37107287533902102798797998220837590246510135740250 46376937677490009712648124896970078050417018260538 74324986199524741059474233309513058123726617309629 91942213363574161572522430563301811072406154908250 23067588207539346171171980310421047513778063246676 89261670696623633820136378418383684178734361726757 28112879812849979408065481931592621691275889832738

Actually the number is quite bigger than that.

How do I put space between two numbers? How do I represent the same element + 'space' to be replaced in notepad?

Solution

You can replace (\d) with \1 {pretend this is a space}.

\d matches a single digit. \1 refers to the first capturing group, which contains that digit.

Replace variables in a formula with their definitions
Replace letters inside words that start with and end with a specific letter not occurring anywhere else with the same amount of a specific character
regex for expression with one separator hyphen
open vimeo url in colorbox using jQuery filter
Split address and numbers
Pyspark Regular Expression add double quotes after comma
In the regex world what's a flavor and which flavor does Java use?
Problems with table extraction using pdfplumber - empty fields in large tables
How do I pass a variable into regex with Node js?
How do I use regex in a SQLite query?
Python RegEx: match words in a string only if they are not preceded by a specific character
Regular expression that ignores HTML entities
Allow access to page only from certain referrer
Regex to match string containing two names in any order
Matching boot times from log using sed -E
Validate Bangladeshi phone number with optional +88 or 01 preceeding 11 digits
Using setCustomValidity stops input from validating
Use dynamic (variable) string as regex pattern in dart
Regular expression matching Android package name
Replace commas not inside single quotes with an @ symbol
Visual Studio Code Search and Replace with Regular Expressions
Split string on commas not inside double quotes
Extracting specific data from a string with regex and Powershell
Parse datetime string in Ydm.His format
Extract all words double wrapped in curly braces
Parse dot-delimited video filename to extract show title, series number and episode number
Split a string into words, preserving contractions but removing leading apostrophes from words
Split string on pipes which are not between square braces
Simple regex pattern for email
How to extract filename without extension in Makefile