Unexpected Factorial@sopuli.xyzEnglish · 5 个月前

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Unexpected Factorial@sopuli.xyzEnglish · 5 个月前

cross-posted to:
[email protected]

cross-posted from: https://piefed.social/post/950402

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5 个月前
Finally a math joke so simple that even I can understand it.

Unexpected Factorial@sopuli.xyz

unexpectedfactorial@sopuli.xyz

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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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