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05-29-2007
| #1 (permalink) |
| Sith Lord on Steroids.  Join Date: May 2007 Location: Canada
Posts: 295
|  Prime or Not Prime Okay, this game is simple. I will provide a number. The person below me , without using a calculator, should say if its Prime, or Not Prime. In mathematics, a prime number (or a prime) is a natural number that has exactly two (distinct) natural number divisors, which are 1 and the prime number itself. ie: 2..it can only be divided by 2 and 1 evenly..so lets start this up! so say if its prime or not then provide a number! 6767 Last edited by metaphor- : 05-30-2007 at 10:04 AM. |
 guinness: easy to pour and sweet as a nut!
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05-30-2007
| #3 (permalink) |
| Commentator  Join Date: May 2007 Location: New Zealand
Posts: 58
  | Re: Prime or Not Prime qtwerp I guess you are supposed to provide another number...? Unless it's not at all like the "The person below me" game. 3452 Last edited by FaceLeg : 05-30-2007 at 08:58 PM. |
| Sapiens ā sē ipsō pendet.  | |
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05-30-2007
| #4 (permalink) | |
| Japanophile Join Date: May 2007 Location: Göteborg, Sweden
Posts: 114
| Re: Prime or Not Prime Quote:
"In mathematics, a prime number (or a prime) is a natural number that has exactly two (distinct) natural number divisors, which are 1 and the prime number itself." The number you mentioned end evenly, and can therefore be divided by 2. Easy one: 109 EDIT: Prime number - Wikipedia, the free encyclopedia EDIT: Never mind the lecture, I misread.  | |
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05-30-2007
| #6 (permalink) | |
| Retired User  Join Date: May 2007
Posts: 372
| Re: Prime or Not Prime Quote:
119...not prime. Divides by 17. 3467811 | |
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05-30-2007
| #11 (permalink) |
| Retired User Join Date: May 2007
Posts: 372
| Re: Prime or Not Prime 76493. Prime? At least I couldn't find a factor... metaphor-: Try 53 on the previous one.  I was working on that one for a long time. heh59711 Last edited by qtwerp : 05-30-2007 at 03:13 PM. Reason: removed the check i had typed out but forgot to delete ^^;; |
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05-30-2007
| #12 (permalink) | |
| Japanophile Join Date: May 2007 Location: Göteborg, Sweden
Posts: 114
| Re: Prime or Not Prime Quote:
Proving it's not is pretty easy once we found out which number to divide it with. I found your number here: http://www.svobodat.com/primes/PRIMES1T.TXT Sorry, I cheated. :s I won't pick the next one. v_v | |
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05-30-2007
| #13 (permalink) |
| Retired User Join Date: May 2007
Posts: 372
| Re: Prime or Not Prime kaminix: I know of only one "easy" way to find a probable prime, but it's not something I could do without program assistance (2^76492 mod 76493 anyone?). I looked up sieves as an alternative, but they seem pretty useless too without help, unless there is some kind of sieve method specifically for larger numbers that I haven't come across yet. 59711 is still up there if anyone's willing to tackle it Last edited by qtwerp : 05-30-2007 at 04:02 PM. Reason: clarification |
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05-31-2007
| #19 (permalink) |
| Sith Lord on Steroids. Join Date: May 2007 Location: Canada
Posts: 295
| Re: Prime or Not Prime 10379 is prime..i hope...2-9 could not divide into it so im stopping there. Time for the easy one..you may need to use a calculator for this next number 0 |
| guinness: easy to pour and sweet as a nut!
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