Benford's law: in natural datasets, the leading digit is 1 about 30% of the time, not 11%

A prime number cannot be divided evenly by any number except 1 and itself — the largest known has 24 million digits

Prime numbers are indivisible by any number other than 1 and themselves, with the largest known having 24 million digits

Pi has been calculated to over 100 trillion digits — but 39 digits is enough to measure the observable universe to the width of a hydrogen atom

Pi's 39-digit approximation measures universe's width to hydrogen atom's size

The Sun makes up 99.86% of all mass in the solar system

The Sun constitutes 99.86% of the solar system's total mass

The birthday paradox: in a group of 23 people, there's a 50% chance two share a birthday

In a group of 23, there's a 50% chance at least two share a birthday due to the birthday paradox

What is the mathematical model behind the SIR (Susceptible, Infected, Recovered) epidemiological framework used to predict the spread of infectious diseases?

dS/dt = -βSI, dI/dt = βSI - γI, dR/dt = γI

A googol is 10^100 — Google was named after it (misspelled)

Google's name, derived from a misspelling of "googol," represents 10^100