>tfw we're about to enter a prime number year for the first time 6 years
>mfw you didnt'realize this
>tfw we're about to enter a prime number year for the first time 6 years
You math folks are kinda gay for numbers, aren't you
What determines a numbers sexual orientation?
...
Whether it's odd or even.
You also didn't realize 2015 was a palindrome in binary and 2016 was 2^11-2^5
I'm predicting a new cicada puzzle this January
they seem to have a hard pecker for primes
>mfw I did actually realize that
What is a prime number?
not yet
It's a number you can divide by 17
Cicada is the united states cypher analyst recruiter puzzle imo
they do puzzles to find people who are very bright and they recruit them before they form out of their control
2013 dumpass
this is what someone will create if cicada doesnt get to them. as you can see this is quite damaging to several scientific fields
Divisible by 3
>13
>divided by 3
K
>Thinks the year 13 was less than 6 years ago
K
13/3=4.333333...
I just divided it by 3. Therefore it's divisible by 3. White square QED. Nice try m7
>for the first time in 6 years
I think you're forgetting about 2013 buddy lol
OP is a dumb pseudo intellectual
If the sum of a number's digits is a factor of 3 then it's divisible by 3.
*number theorists
no, that's its parity
Fascinating, is this true of any other numbers?
It also works for 9. It isn't that interesting. It only takes a minute to prove.
If you subtract and add alternate digits and you get a multiple of 11, then it's divisible by 11.
>2*11=22 -> 2-2=0
>11*11=121 -> 1-2+1=0
>183*11=2013 -> 2-0+1-3=0
>1046*11=11506 -> 1-1+5-0+6=11
>if you get a multiple of eleven, it is divisible by eleven
Yep. That one is pretty damn cool.
Primes seems to be pseudo random complexity.. So it's just funny looking cellular automata?
Does this tell anything about the natural numbers?
>if you read a sentence correctly, you understand its meaning
I know, right? The sentence was pretty clear and concise, but he understood that some people may not understand what he means, so he gave 4 examples. Anyone who didn't understand what he meant after reading that is a complete fucking moron.
It works for any number n in base n+1 (where n is a natural number), also works for sqrt(n) if it's a natural number as well