posted by Jason Kottke · gift link
Based on an analysis of leaked PIN numbers by Nick Berry, Information is Beautiful made this visualization of the most common PINs.
According to the analysis, just 20 4-digit numbers account for 27% of all PINs: 1234, 0000, 7777, 2000, 2222, 9999, 5555, 1122, 8888, 2001, 1111, 1212, 1004, 4444, 6969 (nice), 3333, 6666, 1313, 4321, 1010. The diagonal line is people using repeated pairs of digits (e.g. 2727 or 8888) while the horizontal line near the bottom is people who are presumably using their (19xx) birth year as a PIN. (You can see the beginning of a 20xx line on the left side.)
The best causally unguessable PINs would seem to be unrepeated pairs of numbers greater than 50 — so 8957, 7064, 9653, etc. Choose wisely.
