this post was submitted on 04 Jun 2026
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Mildly Interesting

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My $1 bill has no repeating decimals in its serial number (sh.itjust.works)
submitted 3 months ago by Zonefive@sh.itjust.works to c/mildlyinteresting@lemmy.world
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[–] Imgonnatrythis@sh.itjust.works 33 points 3 months ago (1 children)

Now do your credit card.

[–] LodeMike@lemmy.today 4 points 3 months ago (2 children)

It's not possible because that's 16 digits.

[–] Ziglin@lemmy.world 6 points 3 months ago (2 children)

Base 16 would like a word.

[–] LodeMike@lemmy.today 6 points 3 months ago (3 children)

Credit card numbers are in base 10

[–] Ziglin@lemmy.world 2 points 3 months ago

Seems to be correct, I was thinking of a different card in my wallet.

Ahem I mean I fancypants McGee have the 16 element identity permutation for my card number!

[–] mangaskahn@lemmy.world 1 points 3 months ago (1 children)

What if they are generated in base 16, but numbers containing a-f are discarded. Did you think about that? Huh?

[–] LodeMike@lemmy.today 1 points 2 months ago

Yes. The check digit is calculated using base 10

[–] kkj@lemmy.dbzer0.com 1 points 3 months ago (2 children)

Everything is in base 10 (unless it's in unary).

[–] general_kitten@sopuli.xyz 2 points 3 months ago (1 children)

not if i debase your currency >:3

[–] Gonzako@lemmy.world 1 points 2 months ago

I'd personally enjoy it if it was you doing the debasing

[–] LodeMike@lemmy.today 1 points 3 months ago

Base ten then

[–] badlilbean@sh.itjust.works 5 points 3 months ago

Please tell me base 16 isn't trying to hex-a-decimal

[–] RogueBanana@piefed.zip 4 points 3 months ago

Let me be the judge of that. Maybe you missed it, let me verify it for you.