Skewes' number

Meaning

Noun

• Any of several extremely large numbers used as upper bounds for the smallest natural number $x$ for which $\backslash pi(x)\; >\; \backslash operatorname\{li\}(x)$, where $\backslash pi$ is the prime-counting function and $li$ is the logarithmic integral function. These bounds have since been improved by others.

Origin

• Named after South African mathematician Stanley Skewes.