Unexpected Factorial@sopuli.xyzEnglish · 3 days ago

someone runs Windows 98!

discuss.tchncs.de

someone runs Windows 98!

discuss.tchncs.de

schnurrito@discuss.tchncs.de to

Unexpected Factorial@sopuli.xyzEnglish · 3 days ago

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3 days ago
I still have my Netscape T shirt that they sent when I bought $30k of licenses.

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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