Google number
The n-th Google number is the earliest n-digit prime number found as a substring in decimal expansion of e. Hence the first few Google numbers are 2, 271, 4523, 74713, 904523, 2718281, 72407663 … (Sequence A095935 of OEIS). They were named due to unusual hiring ad that Google put up on a billboard on July 29, 2004.