prime numbers counting game

Originally posted by dave123
correction, i have a passion for being right, and proving others wrong 😄

right on...I'm just here to point out other people's mistakes 😛

shut up
post number (in prime) 173

(edit) 179

**** its fast

if u think 1 isn't a prime number and r stupid go here then http://www-groups.dcs.st-and.ac.uk/~history/HistTopics/Prime_numbers.htmlhttp://www-groups.dcs.st-and.ac.uk/~history/HistTopics/Prime_numbers.htmlhttp://www-groups.dcs.st-and.ac.uk/~history/HistTopics/Prime_numbers.htmlhttp://www-groups.dcs.st-and.ac.uk/~history/HistTopics/Prime_numbers.html

183

191

183 is not a prime number I think.

Oh and 1 is not a real Prime Number. Math doesn'T consider it as one, I do. We don't count it as one by the way at the moment

197

Originally posted by BloodBird
if u think 1 isn't a prime number and r stupid go here then http://www-groups.dcs.st-and.ac.uk/~history/HistTopics/Prime_numbers.htmlhttp://www-groups.dcs.st-and.ac.uk/~history/HistTopics/Prime_numbers.htmlhttp://www-groups.dcs.st-and.ac.uk/~history/HistTopics/Prime_numbers.htmlhttp://www-groups.dcs.st-and.ac.uk/~history/HistTopics/Prime_numbers.html

great site 😕

Originally posted by BloodBird
cannot count can u?!?!? go here dave http://www-groups.dcs.st-and.ac.uk/~history/HistTopics/Prime_numbers.html

FROM THIS NUMBER CONTINUE IN ORDER OMG!!!!

119 FROM THERE3 MEANING THE NEXT ONE IS 123

http://www.math.utah.edu/~alfeld/math/prime.html

the university of Utah says.... Dave is correct 😱

211 now

Actually I am wrong. Its 229 now.

233

oh c'mon people this is fun. We can make fun of each other when we got something wrong. Post!!! NOW!!!!!!!!!!!!

239

Pleasecry. I like this thread.

241 and last time 1 is prime nimber now quiet

Let me help you all out here.

Divisibility of Numbers

Dividing By 2
- If the number is even it is divisible by 2.

Dividing by 3
- Add up the digits. If the sum is divisible by three, then the number is as well.
Examples:
111111: the digits add to 6 so the whole number is divisible by three.
87687687. The digits add up to 57, and 5 plus seven is 12, so the original number is divisible by three.

Dividing by 4
- Look at the last two digits. If the number formed by its last two digits is divisible by 4, the original number is as well.
Examples:
100 is divisible by 4.
1732782989264864826421834612 is divisible by four also, because 12 is divisible by four.

Dividing by 5
- If the last digit is a five or a zero, then the number is divisible by 5.

Dividing by 6
- Check 3 and 2. If the number is divisible by both 3 and 2, it is divisible by 6 as well.

Dividing by 7
- To find out if a number is divisible by seven, take the last digit, double it, and subtract it from the rest of the number.
Example:
If you had 203, you would double the last digit to get six, and subtract that from 20 to get 14. If you get an answer divisible by 7 (including zero), then the original number is divisible by seven. If you don't know the new number's divisibility, you can apply the rule again.

Dividing by 8
- Check the last three digits. Since 1000 is divisible by 8, if the last three digits of a number are divisible by 8, then so is the whole number.
Example:
33333888 is divisible by 8; 33333886 isn't.
How can you tell whether the last three digits are divisible by 8? Phillip McReynolds answers:

If the first digit is even, the number is divisible by 8 if the last two digits are. If the first digit is odd, subtract 4 from the last two digits; the number will be divisible by 8 if the resulting last two digits are. So, to continue the last example, 33333888 is divisible by 8 because the digit in the hundreds place is an even number, and the last two digits are 88, which is divisible by 8. 33333886 is not divisible by 8 because the digit in the hundreds place is an even number, but the last two digits are 86, which is not divisible by 8.

Dividing by 9
- Add the digits. If that sum is divisible by nine, then the original number is as well. This holds for any power of three.

Dividing by 10
- If the number ends in 0, it is divisible by 10.

Dividing by 11
- Here's an even easier method, contributed by Chis Foren:
Take any number, such as 365167484.

Add the first, third, fifth, seventh,.., digits.....3 + 5 + 6 + 4 + 4 = 22

Add the second, fourth, sixth, eighth,.., digits.....6 + 1 + 7 + 8 = 22

If the difference, including 0, is divisible by 11, then so is the number.

22 - 22 = 0 so 365167484 is evenly divisible by 11.

Dividing by 12
- Check for divisibility by 3 and 4.

Dividing by 13
- Here's a straightforward method supplied by Scott Fellows:
Delete the last digit from the given number. Then subtract nine times the deleted digit from the remaining number. If what is left is divisible by 13, then so is the original number.

Originally posted by BloodBird
241 and last time 1 is prime nimber now quiet

i am never posting this topic i mean in this topic again so for the last timeTHAT ISN'T PRIME NUMBERS THIER NOT DIVISIBLE BBY THIS WHEN ADDED SIOT IT IS ANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANYANY ANY ANY ANY ANY ANY I REPEAT ANY NUMBER DIVISBLE BY 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ONE REPEAT ONE AND REPEAT 50 TIMES THE NUMBER ITSELF GO BACK TO SCHOOL... GOD!!!!! 243

one is not, coz it is dividable only by 1! 😬

you're the best, clovie 😊

thank you spencey 😊