Hamartiogonic@sopuli.xyzM to

Unexpected Factorial@sopuli.xyzEnglish · 3 months ago

iNaturalist turns 18!

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iNaturalist turns 18!

Hamartiogonic@sopuli.xyzM to

Unexpected Factorial@sopuli.xyzEnglish · 3 months ago

2

18! = 6 402 373 705 728 000

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TheLeadenSea@sh.itjust.works
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3 months ago
The i at the front looks almost like a ¡ and makes it look Spanish lol
- Hamartiogonic@sopuli.xyzOPM
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  3 months ago
  Oh that’s a good point. My mind isn’t constantly looking for upside down exclamation marks, so definitely missed that one.

Unexpected Factorial@sopuli.xyz

unexpectedfactorial@sopuli.xyz

You are not logged in. However you can subscribe from another Fediverse account, for example Lemmy or Mastodon. To do this, paste the following into the search field of your instance: !unexpectedfactorial@sopuli.xyz

When you use an exclamation mark with a number, you’re actually implying it’s not a normal number any more. It’s a factorial!

Ok, so how does this work?

5!=1×2×3×4×5=120

6!=720

These numbers get really large. For example:

15!≈1.3×10^12

So, next time you see a headline with 2000! in it, you’ll know what to expect.

There are also double factorials (n!!) and iterated factorials (n!)!, and they aren’t the same thing. Just add more exclamation marks and you get multifactorial. Check wikipedia to see how spicy it gets.

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