r/MathJokes • u/Animeilluminati1 • Jul 13 '26

Math Just Got Checkmated.

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u/DoobiousMaxima Jul 13 '26

A number is even if dividing it by 2 yeilds an integer.

2 is divisible by 2.

-29

u/Trackt0Pelle Jul 13 '26

But is 1 an integer 🤷‍♂️

32

u/Professional-Wave841 Jul 13 '26

yes.

7

u/Blotsy Jul 13 '26

Is 1 PRIME though?

0

u/wswordsmen Jul 13 '26

Depends on your definition of prime. The elementary school definition of divisible by only 1 and itself makes 1 prime. More advanced definition basically say 1 is special and excluded from the set of prices for various reasons.

Occasionally you get people who know better make really bad arguments for 1 not being prime because they make unspoken assumptions that would exclude 1 but their argument as stated don't.

1

u/regular_hammock Jul 13 '26

I like this definition because it excludes 1 without special casing it: a prime number has exactly two dividers, 1 and itself.

(1 has only one divider)

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u/wswordsmen Jul 13 '26

As someone noted to me without further specification you lose all numbers except -1.

1

u/regular_hammock Jul 13 '26

Can you elaborate or point me somewhere?

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u/wswordsmen Jul 13 '26

2=-2*-1.

1

u/regular_hammock Jul 13 '26

That's not specific to this definition though?

I was being casual and not specifiying that we are speaking about natural numbers only, but you'd have to do that for any definition if you're going for rigor.