'Special' Numbers

  • \(0\)
  • 11

  • 2\sqrt2
  • ϕ or (5+12)\phi \ or\ (\frac{\sqrt5+1}{2})
  • i or 1i\ or\ \sqrt{-1}

  • τ or 2π\tau\ or\ 2\pi

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

  • 299792458299792458 (the speed of light in a vacuum in ms\frac{m}{s})
  • 6.67408×1011\approx 6.67408 \times 10^{-11} (the universal gravitational constant in m3kgs2\frac{m^3}{kg \cdot s^2})
  • 1.616255×1035\approx 1.616255 \times 10^{-35} (the Planck length in mm) (Thanks to James Watson)
  • 5.39121×1044\approx 5.39121\times 10^{-44} (the Planck time in ss) (Thanks to James Watson)

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

Note by Lâm Lê
10 months ago

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1 vote

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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.

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Jeff Giff - 10 months ago

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

James Watson - 10 months ago

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also the Planck length/time

James Watson - 10 months ago

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How would you put Planck units as numbers?

Lâm Lê - 10 months ago

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normal units of measurement. for example: 1 Planck Length 1.616255×1035 meters, 1 Planck Time 5.39×1044 seconds1 \text{ Planck Length } \approx 1.616255×10^{-35} \text{ meters, }1 \text{ Planck Time } \approx 5.39 \times 10^{-44}\text{ seconds}

James Watson - 10 months ago

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