chrischona2015.org! editors have selected this post as a favourite of 2012. It very first appeared ~ above chrischona2015.org! chrischona2015.org in September and also was one of the most famous stories the the month. Reader joked around people who usage the most usual PIN codes, and also shared how they came up v their own. "My pin number is my article office crate number from mine time in the Air force 30 years earlier on a base that no much longer exists," wrote user Nick. "Feel complimentary to hack that."

If you shed your ATM card on the street, exactly how easy would certainly it be because that someone to correctly guess her PIN and proceed to clean the end your to save account? rather easy, according to data scientist Nick Berry, founder that Data Genetics, a Seattle modern technology consultancy.

You are watching: How many possible combinations of 4 numbers

Berry analyzed passwords from previously released and exposed tables and also security breaches, filtering the outcomes to simply those the were specifically four digits long <0-9>. There room 10,000 feasible combinations that the digits 0-9 have the right to be arranged into to kind a four-digit code. Berry analyzed those to find which room the least and most predictable. He speculates that, if users pick a four-digit password for an digital account or other internet site, it"s not a large to usage the same number for their four-digit bank PIN codes.

Somewhat intriguing was #22 top top the most common password list: 2580. It appears random, however if friend look at a phone call keypad (or ATM keypad), you"ll see those numbers space straight under the middle — yet another sign the we"re uncreative and also lazy password makers.

The the very least Predictable Password

The least-used pen is 8068, Berry found, with just 25 occurrences in the 3.4 million set, which equals 0.000744%. (See the second table because that the least popular passwords.) Why this set of numbers? Berry guesses, "It"s no a repeating pattern, it"s no a birthday, it"s no the year Columbus uncovered America, it"s no 1776." at a details point, these numbers in ~ the bottom of the list space all type of "the shortest of the low, they"re all noise," the says.

See more: Do You Wear A Padded Girdle Under Padded Football Pants ? Do You Wear Football Girdle Under Pants

A few other amazing tidbits native Berry:

-The most popular PIN password (1234) is used an ext than the shortest 4,200 password combined. - people have even less creativity in selecting five-digit passwords — 28% use 12345. - The 4th most popular seven-digit password is 8675309, motivated by the Tommy Tutone song. -People love using couplets for their PINs: 4545, 1313, etc. And also for part reason, they don"t like using pairs of number that have actually larger number gaps between them. Combinations favor 45 and also 67 occur much more frequently than 29 and also 37. - The 17th most typical 10-digit password is 3141592654 (for those of girlfriend who are not math nerds, those room the an initial digits of Pi).