Even Numbers and Primes

Discussions focus on properties of even and odd numbers, the fact that 2 is the only even prime, powers of 2, perfect numbers, and basic number theory misconceptions.

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#4610
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Keywords

OP i.e odd number numbers sum digits mod integer integers proper proof

Sample Comments

brokensegue Dec 13, 2019 View on HN

They thought all even numbers are powers 2

m3kw9 May 3, 2023 View on HN

Is like asking if pi is even or odd

zarzavat Dec 31, 2025 View on HN

Presumably the number they are doing is less than 2 otherwise this is disgusting.

DrDroop Jul 8, 2023 View on HN

const THE_LEFT_HANDED_IDEAL_FOR_THE_EVEN_NUMBERS_OF_THE_NATURAL_NUMBERS_UNDER_MULTIPLICATION = 2

mcguire Jun 3, 2021 View on HN

A proof of existence for any number?

st_goliath Apr 12, 2021 View on HN

"Any integer can be expressed uniquely as a sum of unique powers of even primes."

ezequiel-garzon Sep 22, 2016 View on HN

Plenty of even perfect numbers. Find some odd ones!

ccppurcell Mar 27, 2023 View on HN

I wasn't asking for complex mathematics, just for the basic understanding that an even number greater than 2 can't be prime.

D3 Oct 10, 2012 View on HN

At least it's a nice even number.

PuercoPop Dec 2, 2012 View on HN

You could say an even number, which includes zero for that effect.