Re: JSH: Surrogate factoring, periodic behavior
- From: Gib Bogle <bogle@xxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Sat, 01 Sep 2007 16:03:42 +1200
mike3 wrote:
On Aug 31, 10:09 am, JSH <jst...@xxxxxxxxx> wrote:Having completed better analysis on surrogate factoring I found the
equations that explain a periodic behavior at least one person has
noted in posts, where for a given k and n, if you find a prime factor
p of your target T with that n, then you will find other solutions by
adding multiples of p to n.
Two of the equations determining that behavior are
Cw = n + (k + 2xr_1*p_1)( k + 2xr_2*p_2) - ((k + 2xr_1*p_1)( k +
2xr_2*p_2) - 2k^2)/T
and
w = k + 2xr_2*p_2 mod T
where if the second equation is true for a given n, then you will have
a solution to the surrogate factoring equations at that n, but that is
an only if. There C doesn't matter but is just some non-zero integer,
as w just needs to be any factor of the right side--which is an
integer I should note as the T must divide through--for which the
second condition is met.
That is the primary decision relation that determines if a surrogate
factorization can work or not.
Remember the surrogate factorization involves factoring a target
composite T by solving
(x+k)^2 = y^2 + 2k^2 + nT
where the primary question has been, how do you pick k and n?
If they are picked correctly then some solution for x and y will also
be a solution for
x^2 = y^2 mod p
where p is a prime factor of T.
James Harris
.
You've never explained what x and y are supposed
to be or how they are supposed to be used.
How are they?
Duh! They are in a quadratic!
.
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