Hah, if you’re referring to the fact that repetitive digits show up in 2FA codes, this is a great example of a randomness illusion. Of the 1000000 possible 6-d

Hah, if you’re referring to the fact that repetitive digits show up in 2FA codes, this is a great example of a randomness illusion. Of the 1000000 possible 6-digit numbers: 151200 have six unique digits 453600 have five unique digits 327600 have four unique digits 64800 have three unique digits 2790 have two unique digits 10 have only one unique digit Almost 40% of the time you will have a 2FA code that has at most four unique digits: it has two digits appear twice (e.g. 463426), or one digit appear thrice (e.g. 838819), etc. These look distinctly “non-random”, but appear frequently when using 2FA systems. In fact, having a number that “looks random” (has all unique digits) is comparatively uncommon at 15%; even in that set, there are many numbers with discernible patterns like “234719” and “136420”. Hence, if you find yourself believing that your 2FA codes look non-random, it’s probably an illusion. If you’re really uncertain, you could always record a large sample of codes and look for statistical anomalies.