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primenumbers · Prime numbers and primality testing

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  • Members: 1089
  • Category: Number Theory
  • Founded: Dec 27, 2000
  • Language: English
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Messages 24420 - 24449 of 25073   Oldest  |  < Older  |  Newer >  |  Newest
Messages: Simplify | Expand Author Sort by Date ^
24420 mikeoakes2 Send Email Sep 1, 2012
7:13 pm
... That was 9 months ago. Since then, this "learning process" by David, Kevin and me has continued, and if you visit that link you will find that those 18...
24421 leavemsg1 Send Email Sep 7, 2012
2:52 pm
... if p= 4*k +1, and q= 2*p +3 are both prime, then if [(Mp)^p -p] mod q== N, and q mod N== +/-1, then (Mp), the base... is prime. (someone would have to...
24422 leavemsg1 Send Email Sep 7, 2012
6:29 pm
clarification: also, if (Mp) mod p = 1 and N = 0, then if N = 0, then that (Mp) is prime as well. ... {typo correction} = -2 -1 and (-3)^5 -5 = -248 and...
24423 leavemsg1 Send Email Sep 8, 2012
5:20 am
either if (Mp) mod p = 1, and N is a square, then (Mp) is prime as well, or simply iff (Mp) mod p == 1, then choose a different 'p'. I believe it works now. ...
24424 James Merickel
moralforce120 Send Email
Sep 9, 2012
12:35 pm
Please repeat in full corrected state or give us notice of where in print that is to be found at some time.  I cannot read the combination and this looks...
24425 leavemsg1 Send Email Sep 9, 2012
5:30 pm
so many times, there are typos when using e-mail. in math, Mp is often used to describe a Mersenne number with a prime expo- nent. I have corrected it to (Mr)....
24426 leavemsg1 Send Email Sep 10, 2012
4:19 am
one such additional and logical restriction is (Mr) mod q =/= p....
24427 Maximilian Hasler
maximilian_h... Send Email
Sep 10, 2012
5:00 am
For r=6, Mr is composite but p=5, q=13, N=2 yields a counter-example. What about r=37, p=23593, N=1 ? all your conditions are satisfied, but Mr is not prime. ...
24428 leavemsg1 Send Email Sep 10, 2012
1:59 pm
I agree. it will be difficult to formalize the conditions without knowing how to construct the Lagrangian-style proof. it wouldn't be when r is not prime, and...
24429 Mark
marku606 Send Email
Sep 10, 2012
3:33 pm
How many ways can the square of an odd prime n be expressed as the sum of four non zero squares? The answer surprisingly appears to have the formula: f =...
24430 Maximilian Hasler
maximilian_h... Send Email
Sep 10, 2012
9:48 pm
How do you write 5 as sum of four nonzero squares ? Maximilian PS: if you haven't heard back from OEIS, the messages may have been sent to trash by your spam...
24431 Maximilian Hasler
maximilian_h... Send Email
Sep 10, 2012
9:59 pm
I'm sorry, I did not read the definition correctly, I missed "the square of" the odd prime. I checked and found it indeed surprising that neither of the...
24432 Mark
marku606 Send Email
Sep 10, 2012
10:22 pm
I just looked, and yes indeed it went to a spam folder. But it was sent just today, five hours ago. I looks like I will have to do some editting to make it...
24433 djbroadhurst Send Email Sep 10, 2012
10:54 pm
... Here is the generating function for Mark's interesting claim: g(x)=x^4/((1-x)*(1-x^3)*(1-x^8)); f(n)=floor((n^2+4*n+24)/48); ...
24434 leavemsg1 Send Email Sep 11, 2012
5:45 am
the 4 equations for a Mersenne number (Mr) where r is prime. (either one or the other is true) p=4k+1, q=2p+3 (both prime) [(Mr)^p-p] mod q == -1, or p=4k+3,...
24435 j_chrtn Send Email Sep 11, 2012
8:59 am
Hello group, What is the next term of the following serie a(n): a(1) = 2 a(2) = 2 a(3) = 2 a(4) = 296 a(5) = 369719 a(6) = 457578 a(7) = ? Opened question: is...
24436 Mark
marku606 Send Email
Sep 11, 2012
2:29 pm
... Thank you David. A friend told me that your code demonstrates that your g(x) function appears to have my sequence as coefficients. I must confess I am...
24437 Maximilian Hasler
maximilian_h... Send Email
Sep 11, 2012
2:41 pm
Actually David gave simply the g.f. (generating function) of the sequence f(n)=floor((n^2+4*n+24)/48) In some sense there is no "higher" number theory involved...
24438 Steven Harvey
harvey563 Send Email
Sep 11, 2012
5:18 pm
http://www.nature.com/news/proof-claimed-for-deep-connection-between-primes-1.11378?WT.ec_id=NEWS-20120911   Comments, anyone?   Steven Harvey ...
24439 paulunderwooduk Send Email Sep 11, 2012
5:28 pm
Hi, http://arxiv.org/abs/1209.2007 is easy reading. I think 1 is not prime because 1 square tile is a square! Paul...
24440 whygee@...
yasep16 Send Email
Sep 11, 2012
5:31 pm
... but in some cases it's handy to count it as a prime :-) yg...
24441 Chris Caldwell
primemogul Send Email
Sep 11, 2012
11:15 pm
... Thanks, that was the goal. I thought I might point out this article refers to our list of references about the primality of one with a "URL to be...
24442 djbroadhurst Send Email Sep 12, 2012
9:37 am
... Indeed. It seemed to me that g(x) = x^4/((1-x)*(1-x^3)*(1-x^8)) = suminf(n=0,f(n)*x^n) made Mark's conjecture ... look neater. I made no attempt to prove...
24443 Robert Gerbicz
robertgerbicz Send Email
Sep 12, 2012
11:24 am
There is a formula for r_4(n), when you allow zeros and distinguish signs and order, see http://mathworld.wolfram.com/SumofSquaresFunction.html ...
24444 Phil Carmody
thefatphil Send Email
Sep 12, 2012
4:43 pm
... Well, the maths is so far above my head I cannot comment on it at all. However, I must say that I'm worried that he seems to be working in a vacuum - about...
24445 Maximilian Hasler
maximilian_h... Send Email
Sep 12, 2012
6:04 pm
... Hum, "In this case, in which r=2, sqp(abc)^r/c is nearly always greater than 1, and always greater than zero. " "Nearly always" does not mean anything, and...
24446 Jack Brennen
jbrennen Send Email
Sep 12, 2012
6:18 pm
... Actually the ABC conjecture states that for any r > 1, sqp(abc)^r/c > 1, except for some finite number of exceptions. There's your "nearly always",...
24447 James Merickel
moralforce120 Send Email
Sep 13, 2012
12:35 am
Phil Carmody has suggested that there are standard texts that are not pertinent in reference.   Phil, would you be so kind as to name these (to facilitate...
24448 Jack Brennen
jbrennen Send Email
Sep 13, 2012
2:18 am
... Here's one from the bibliography: [DmMn] H. Dym and H. P. McKean, Fourier Series and Integrals, Academic Press (1972). There are others....
24449 djbroadhurst Send Email Sep 13, 2012
11:33 am
... The claimed inequality of "bounded discrepancy classes" in Theorem A of Paper IV is mind-boggling general; much wider than ABC. It may take a long time for...
Messages 24420 - 24449 of 25073   Oldest  |  < Older  |  Newer >  |  Newest
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