Phi
My favorite number is 1.618033988749894848204586834365638117720309179805762862135448622705260462818902…
Back when I first learned of the Google calculator, the first “magic constant” I tested for recognition was Phi. Sure, e is exponentially cool, and everybody loves pi, but Phi not only golden, but really, really irrational.
I posted this in December 2003 during week 1556.
For more, you should follow me on the fediverse: @hans@gerwitz.com