Definitions by Numerati
Pinosticism
Short for “Pi Agnosticism.” The unbelief in the reality of the number π in spite of some suspicions that it may not be nonexistent on this side of eternity or on some other planets or galaxies.
Is pinosticism some mathematical or numerological equivalent of agnosticism among radical members of the mathematical brethren?
Pinosticism by Numerati January 22, 2026
Purrfect Number
The number of cats or kittens a pet lover could own based on their financial situation that would allow them to lovingly care for them, space constraint to house them, or national law that lays down how many feline members they could live with.
The purrfect number in every country varies, depending on a number of factors like geography, social responsibility, and religious views towards the feline community.
Purrfect Number by Numerati December 18, 2025
6-7
When puritan parents are asked by their kids what the number sixty-nine means, they pretend they misheard it as sixty-seven, so they start chanting “six-seven, six-seven, six-seven” repeatedly—each time louder and faster—until the young ones start parroting it too.
Banana Pi
The title of a contemporary artwork by a maverick artist, with the number π in different typefaces and fonts randomly spread out on the skin of a banana, whose starting price at an upcoming auction is forecast to be at least US$3.14 million.
A billionaire felon who’s recently pardoned for his years-long crypto crimes is rumoured to be a potential buyer of “Banana Pi,” with the plan to donate it to a presidential library.
Piradise
Short for “Pi Paradise.” A glimpse of what the number π would look like for geeks, whose names would make it in the Book of Life, albeit the chances for a large percentage of them getting into heaven are disproportionately lower than those who were not born or blessed with the “math gene.”