Showerthoughts

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A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. A showerthought should offer a unique perspective on an ordinary part of life.

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Amazon should've made Prime Day fall on a date corresponding to an actual three-digit prime number. (sh.itjust.works)

submitted 5 months ago* (last edited 5 months ago) by [email protected] to c/[email protected]

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Amazon is running a Prime Day sale on July 16 and 17. Setting aside the fact that this is two separate days, neither 716 nor 717 are prime numbers. They should've done 7/19 instead.

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[–] [email protected] 13 points 5 months ago (9 children)

How the hell is 717 not a prime number? Who fucked that up? I vote we just change that

[–] [email protected] 3 points 5 months ago (8 children)

Divisible by 3. Easy to check since 7 + 1 + 7 = 15 which is divisible by 3.

[–] [email protected] 4 points 5 months ago (7 children)

Oh awesome that's a neat trick I've never seen before. How does that work? For a number like 700 for example, 7 + 0 + 0 = 7 but 700 is visible by 10.

[–] owsei 2 points 5 months ago

A programmer I know wrote a small paper about this

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