The user can set a dynamic numeric passcode that follows a hidden rule instead of a fixed code. 11814525 is an example of such a dynamic sequence.
Alternatively, could it be a date in some format? Like 11 (month) 81 (day?) 45 25? Unlikely, since months go up to 12, days up to 31. 118 (day) 14 (maybe), but maybe not. 11814525
The number is associated with several distinct types of "useful content," ranging from patent documents and educational materials to news articles and international financial reports. U.S. Patent 11,814,525 (Material Science) The user can set a dynamic numeric passcode