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Messages 19671 - 19700 of 21093   Oldest  |  < Older  |  Newer >  |  Newest
Messages: Simplify | Expand   (Group by Topic) Author Sort by Date ^
19671
Hello, Check out this free website www.mathebook.net it has several Math e-workbook in Virtual as well as PDF format, the virtual one you can solve online and...
bahu_laxmi
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Nov 3, 2008
4:49 pm
19672
Mark,   I'm going to make you a gentleman's bet that I can get a prime pair generated for each unique N and that each and every N will be used once and only...
Bill Krys
billkrys
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Nov 4, 2008
2:06 pm
19673
... generated for each unique N and that each and every N will be used once and only once (I think it'll ultimately depend on what ineger I start with). I'm...
Mark Underwood
marku606
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Nov 4, 2008
11:30 pm
19674
Hello: I found a new mathematical constant. Can someone find some algebraic relation with other constants? F[n_]:= ...
Sebastian Martin
sebi_sebi
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Nov 4, 2008
11:36 pm
19675
Hi Bill, Pardon the top post, but it just came to me why your conjecture cannot work. It has to do with prime gaps. For example consider the incredible prime...
Mark Underwood
marku606
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Nov 5, 2008
3:59 am
19676
... It looks like you started the primes at 3, rather than 2. (And, the dividing by two thing is unnecessary.) If you started at 2 or 5 or 7 ect, you would...
Mark Underwood
marku606
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Nov 5, 2008
2:35 pm
19677
Mark,   1st of all, I think you and I are reversing what we call I and N, but I'm going to continue to use my nomneclayure unless what you've used is an...
Bill Krys
billkrys
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Nov 6, 2008
4:58 pm
19678
... to use my nomneclayure unless what you've used is an accepted standard and then I'll comply with that standard. ... relationship between N and I, there...
Mark Underwood
marku606
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Nov 6, 2008
8:05 pm
19679
... Hello Jens and Robert, Thanks for your valuable comments. I forgot to check the criteria of m# < 2^n, mainly because it was a search with constant n. ...
dibo12fr
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Nov 6, 2008
9:21 pm
19680
Congratulations to Hugo Platzer for his discovery of the largest known Generalized Woodall prime, 189620*19^189620-1, with 242483 decimal digits! You go,...
harvey563
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Nov 7, 2008
4:48 pm
19681
Hello all: Prove the following conjecture: Let p and q consecutive prime numbers p>q and Phi(p^2-pq+q^2)=((p+q)^2)/6 then p and q are twin primes i.e. q=p-2. ...
Sebastian Martin
sebi_sebi
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Nov 7, 2008
10:50 pm
19682
I had problems understanding the original problem formulation so I will try a more formal description. Given two natural numbers a < b, find b-a+1 distinct...
Jens Kruse Andersen
jkand71
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Nov 8, 2008
4:04 am
19683
Hello friends Being shocked when I have heard such this amazing news that an Iranian professor named  MR Moosavi  has explored the prime numbers formula...
amin B
aminb_6829
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Nov 8, 2008
9:04 am
19684
... "Strange" is indeed the word. This is quite an interesting case. His claim about the production of prime numbers and only prime numbers using his formula...
Phil Carmody
thefatphil
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Nov 8, 2008
10:54 am
19685
is this for real? -alex ... -- alexander.petty@... cell: +001.540.272.7970 skype: alex.petty [Non-text portions of this message have been removed]...
Alex Petty
hdcalex
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Nov 8, 2008
11:20 am
19686
... Please don't top-post. "This", as a demonstrative pronoun, refers to prior context, yet you've placed the context after it. ... And now to address your...
Phil Carmody
thefatphil
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Nov 8, 2008
2:18 pm
19687
let me ask again. is this a real discovery? i didn't follow the previous explanation. thanks, alex -- alexander.petty@... cell: +001.540.272.7970 skype:...
Alex Petty
hdcalex
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Nov 8, 2008
2:55 pm
19688
... It depends what you mean by real. It works correctly and he may be the first to publish this particular formula, but useless prime formulas based on ...
Jens Kruse Andersen
jkand71
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Nov 8, 2008
6:31 pm
19689
Let x a integer number>1. x is a prime number if and only if it is a solution of this equation: ...
Sebastian Martin
sebi_sebi
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Nov 8, 2008
9:50 pm
19690
... That's, in its shorter form, is the oldest one in the book! You've attempted to obfuscate it by separating it into two sums, but we can see through that. ...
Phil Carmody
thefatphil
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Nov 8, 2008
10:08 pm
19691
Hello Friends, Here is very interesting result that I found about number 9 and sum of digits. Sum of digits of the sum of 9+any integer is the integer itself....
dm_kulkarni45
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Nov 9, 2008
7:39 am
19692
... Well Jens I want compensation from Bill for what I feel is about 2 months taken off my life trying to do this by hand in the last three hours. I went as...
Mark Underwood
marku606
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Nov 9, 2008
7:51 am
19693
Hello all: Prove that n+(Prime[n])^n is composite for all n>=4 or find a countraexample. (for n odd is trivial) (for n=q-1 q prime is also trivial; Fermat...
Sebastian Martin
sebi_sebi
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Nov 9, 2008
11:57 am
19694
... Such quickly growing sequences not containing primes after a certain stage is mathematically usually not particularly interesting, as the probability of it...
Phil Carmody
thefatphil
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Nov 9, 2008
12:50 pm
19695
... Lo and behold it doesn't. Jen noticed that (41,48) yields a negative 'prime', so is bad. Now, I have to determine if this whole exercise actually caused...
Mark Underwood
marku606
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Nov 9, 2008
2:57 pm
19696
... Amen to that. I left this group in April 2003, shortly after posting http://tech.groups.yahoo.com/group/primenumbers/message/12037 I now feel able to...
David Broadhurst
djbroadhurst
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Nov 9, 2008
6:17 pm
19697
Info on contradicting Hardy-Littlewood conjectures: Exhaustive searching for admissible prime tuple patterns has resumed. Exhaustive search limit has been...
Tom
thoeng
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Nov 9, 2008
11:38 pm
19698
Mark and Jens,   thanks for trying. I am going to withdraw from the group for a while to tend to work, but I'll come back if I find anything or need more...
Bill Krys
billkrys
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Nov 12, 2008
2:19 pm
19699
Some fun: The first odd prime is three. The first three whole number powers of three are 1,3 and 9. The four additive combinations of these three numbers...
Mark Underwood
marku606
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Nov 12, 2008
7:01 pm
19700
The 4 numbers 1, 3*2^1, 3*2^2 and 3*2^3 (1,6,12,24) have all eight of their additive combinations prime: 5,7,17,19,29,31,41, and 43. Mark...
Mark Underwood
marku606
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Nov 12, 2008
9:17 pm
Messages 19671 - 19700 of 21093   Oldest  |  < Older  |  Newer >  |  Newest
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