That’s probably because 3.14 was virtually ingrained into our psyche as school kids, and as a quick reminder 3/14 (which is Einstein’s birthday) I’ll bet you also remember Richard of York Gave Battle In Vain or (ROY G BIV) as a quick reminder for the colors of the spectrum Hotwater
All I know is this: 3.1415926... farther than that I haven't bothered to memorize. Other interesting number, if you've read the da vinci code you know: