Try more numbers. Or look here:

http://tinyurl.com/ypg2bu

Nvm 140,000 works i figured it out on my ownz XD and wikipedia helped

dunno.......head scratch.........errrrrrrr....

3

3squared = 9

9 + 3 = 12

12 + 41 = 53 - a prime number.

Pudding bear, you are an excellent reader.

Like you are at sarcasm.

Grubber, didn't catch the multiples of 10 part, but what the heck? Did I ever concentrate on the sub-topics? Heck no, doesn't 10,000 work, who knows?

Nvrmnd he got the answer, and it's strange to see you in this forum as well.

Again, you're missing a somewhat key point.

HINT: the word "not" is involved

Yah, and I guessed 10,000 just dunno if it works and cannot be bothered to work it - this is why GT should have a calculator, in fact someone has recently requested this.

And why are you here? Haven't you a forum with your name on it to be going to?

Someone being you with a different name.

Nope.

But same IP.

And did you just delete all those polls?

If you're allowed real numbers, you can put in a non-integer and get back a number that isn't prime, since primes are, by definition, integers.

And 41 is also a twin prime: 43 is also a prime. So x = 1 works. I don't know why the hint was powers of 10, that's just absurd.

And 41 is also a twin prime: 43 is also a prime. So x = 1 works. I don't know why the hint was powers of 10, that's just absurd.

You made the same mistake Pudding Bear did. Read the original post again.

and not come out prime? Pshaw, use a negative number. Try -2. :-p

4 - 1 + 41 = 44

Darn, now I've changed the original problem to x^2 + x/2. Where's the delete post button?

Okay, I declare all of us idiots.

The trivial answer is 41, as then

(41)^2 + 41 + 41

is divisible by 41, and thus can't be prime.