'Is there a complete list anywhere of the exponents n such that k.2^n+1 is prime for the first time, for k=1 to 78556?' It would be nice if this was also...
Consider n, and d=1,3,7,9 Either n is prime, or create n=n*10+d Now, either n is prime or create n=n*10+d (note the d is fixed) This routine always produces a...
Excepting n%3==0 with d=3 or 9. Jon Perry perry@... http://www.users.globalnet.co.uk/~perry/maths/ http://www.users.globalnet.co.uk/~perry/DIVMenu/...
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Paul Leyland
pleyland@...
Jun 5, 2003 11:24 am
... Proof please. I noted your exceptions in a later post. What I'm asking for is a proof that the process always terminates in a prime and that an infinite...
It is a conjecture - 'formation of opinion on incomplete grounds; guess'. Other than for trivial situations, I agree that it is difficult to decide which way...
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Sander Hoogendoorn
sander.hoogendoorn@...
Jun 5, 2003 2:18 pm
... http://home.zonnet.nl/sander.hoogendoorn/keller_primes.zip Both sorted by K and by N For K < 10000 the numbers are only PRP since winpfgw keeps on crashing...
... Try n = 176, d = 1 You'll never get a prime....
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Steven Whitaker
steven@...
Jun 5, 2003 2:44 pm
Jon In which case, it would be better to pose it as a question, not a fact "Does this routine always produce a prime?" The answer is no - try n=6623 and d=1....
Could somebody please tell me if there is a list of Weights output from this Applet. Especially Top Weights/Lowest Weights upto different limits say k<10^6,...
The completely mystifying Perrin's sequence, defined at: http://ftp.ai.univie.ac.at/perrin.html seems to have another property; A(n^2)%n==0 iff n is prime ... ...
Bite... ... I agree with you that it has many interesting properties similar to the Lucas sequence; The former is cubic-based and the latter quadratic-based. ...
Should have been: f=n^3-n-1: f is prime <=> f|n^f-n (conjecture) David Broadhurst suggested, based on ideas of Shanks and Erdos, that there is such a...
Hi +-1 testers, With a little help from my friends we have built on work by Wilfred Keller et al and are extending the search for primes of the for 3*2^n- 1....
'271441=521^2 the first perrin pseudoprime! I did think of this, and came up with the preposterous; n is prime <=> A(n^k)modn==0 for some k Jon Perry ...
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primenumbers@yahoogro...
Jun 5, 2003 9:07 pm
Enter your vote today! A new poll has been created for the primenumbers group: Which thread of prime number theory will solve the mystery of Prime Numbers? o...
Please vote; http://groups.yahoo.com/group/primenumbers/surveys?id=1102154 Jon Perry perry@... http://www.users.globalnet.co.uk/~perry/maths/ ...
12648
primenumbers@yahoogro...
Jun 5, 2003 9:15 pm
Enter your vote today! A new poll has been created for the primenumbers group: What religion are you? o Christian o Buddhist o Muslim/Islam o Jewish o...
That is interesting. If we generalize, then n(1) = n(0)*k + d When interated u times this becomes n(u) = n(0)*k^u + d(k^u - 1)/(k-1) So we should at least...
... and then Jon wrote ... When? Before or after your original post on this subject? ... This is just bad logic? : "521^2 is prime <= A(521^2k)=0 mod 521^2...
Is the non-computer convention to place the decimal point midway between the top and base of the writing height? If so, why do computers not utilize this? Jon...
I have posted these, but I think that they are of significant importance, so I am giving you a preview. ... %I A084833 %S A084833 1, 3, 5, 1, 15, 9, 15, 6, 3,...
'It depends on where you are. In the US, it is just above the bottom, like a period.' I looked at some books, one used the period, but it was a computer based...
And where would you put this new key on the keyboard? Alt-0183 on the numpad *should* give you the middle dot, might be dependent upon your codepage -- 2·3·5...
ALT+0183 works for me. As you say, things are different in the usa, but here in the uk I think we write; 2.3.5=30 for multiplication 3·14159265 for decimal...
It looks as if it is reversed from the UK to the USA, as I would interpret the middle dot as a multiplicative identifier, and a baseline dot as a decimal point...
