'Special' Numbers

$0$
$1$

$e$
$\pi$ , for formulae, see Formulae For $\pi$

$\sqrt2$
$\phi \ or\ (\frac{\sqrt5+1}{2})$
$i\ or\ \sqrt{-1}$

$\tau\ or\ 2\pi$

$\infty$ (Thanks to Jeff Giff)
$W(1)$ (the solution to $xe^x=1$ (Thanks to James Watson)

$299792458$ (the speed of light in a vacuum in $\frac{m}{s}$ )
$\approx 6.67408 \times 10^{-11}$ (the universal gravitational constant in $\frac{m^3}{kg \cdot s^2}$ )
$\approx 1.616255 \times 10^{-35}$ (the Planck length in $m$ ) (Thanks to James Watson)
$\approx 5.39121\times 10^{-44}$ (the Planck time in $s$ ) (Thanks to James Watson)

If there are other numbers that you think should be added to this list, please comment.

#NumberTheory

Easy Math Editor

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`2 \times 3`	$2 \times 3$
`2^{34}`	$2^{34}$
`a_{i-1}`	$a_{i-1}$
`\frac{2}{3}`	$\frac{2}{3}$
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`\sum_{i=1}^3`	$\sum_{i=1}^3$
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Comments

There are many numbers like c, g and more that you can add @Lin Le. C is the speed of light, and g is the universal gravitational constant.

A Former Brilliant Member - 8 months, 1 week ago

$\infty$

Jeff Giff - 8 months, 2 weeks ago

$\Omega$ which is the solution to $xe^x=1$ (can also be expressed as $W(1)$ where $W(\cdot)$ is the Lambert's W Function/product log)

James Watson - 8 months, 1 week ago

also the Planck length/time

James Watson - 8 months, 1 week ago

How would you put Planck units as numbers?

Lâm Lê - 8 months, 1 week ago

normal units of measurement. for example: $1 \text{ Planck Length } \approx 1.616255×10^{-35} \text{ meters, }1 \text{ Planck Time } \approx 5.39 \times 10^{-44}\text{ seconds}$

James Watson - 8 months, 1 week ago

Math	Appears as
Remember to wrap math in `\(` ... `\)` or `\[` ... `\]` to ensure proper formatting.
`2 \times 3`	$2 \times 3$
`2^{34}`	$2^{34}$
`a_{i-1}`	$a_{i-1}$
`\frac{2}{3}`	$\frac{2}{3}$
`\sqrt{2}`	$\sqrt{2}$
`\sum_{i=1}^3`	$\sum_{i=1}^3$
`\sin \theta`	$\sin \theta$
`\boxed{123}`	$\boxed{123}$