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  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

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#26 2013-02-26 20:11:59

Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,018

Re: no. of divisers

Hi bobbym

I think we should stop chatting because it is abother persons thread, and also, we have already reached that magical point where I have no idea what you are talking about.

“Here lies the reader who will never open this book. He is forever dead.
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.


#27 2013-02-27 05:01:20

Registered: 2012-11-21
Posts: 128

Re: no. of divisers

Yes Bobbym answer Given is

would you like to explain it to me. Thanks


#28 2013-02-27 05:26:57

From: Bumpkinland
Registered: 2009-04-12
Posts: 107,133

Re: no. of divisers


I know of nothing better than computing the divisors and then checking mod 4 for each one.

I have been researching the problem for something else but have not found anything.

Just finished reading 8 books on number theory, found 3 new was to compute the Jacobi symbol but did not find a shortcut for yours.

Last edited by bobbym (2013-02-27 12:01:44)

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.


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