kallend 2,106 #1 February 6, 2013 news.cnet.com/8301-1001_3-57567844-92/amateur-effort-finds-new-largest-prime-number/ New largest prime number found. (until the next one, that is)... The only sure way to survive a canopy collision is not to have one. Quote Share this post Link to post Share on other sites
Alex101 0 #2 February 6, 2013 Found my password :( Hello DZ :D Quote Share this post Link to post Share on other sites
Quaalude 0 #3 February 6, 2013 I'd rather have a prime rib. Quote Share this post Link to post Share on other sites
Remster 30 #4 February 6, 2013 Quoteuntil the next one, that is) I wonder if someone has looked into if there is a last one or not.Remster Quote Share this post Link to post Share on other sites
skycatcher68 7 #5 February 6, 2013 Cool, one less number that I might have to factor.What if the Bible had been written by Stephen King? Quote Share this post Link to post Share on other sites
kallend 2,106 #6 February 6, 2013 QuoteQuoteuntil the next one, that is) I wonder if someone has looked into if there is a last one or not. Yes, Euclid did. Euclid's Proof Suppose that there are only finitely many primes, say n of them. We could then make a list of these n primes, say p1, p2, ..., pn. Then consider the integer m obtained by multiplying all of the primes, and then adding 1. This new number m is either prime or it is not. But m is clearly larger than all of p1, p2, ..., pn so it cannot be one of the primes. So m is not prime, and therefore must be evenly divisible by some prime. But we are supposing that the only primes are p1 through pn--and none of these primes divides m evenly, for when m is divided by one of these primes, the remainder is 1. This contradiction shows that the supposition that p1, p2, ..., pn is a complete list of all primes must be false. The conclusion is that there are not finitely many primes; there are infinitely many.... The only sure way to survive a canopy collision is not to have one. Quote Share this post Link to post Share on other sites