[p] **search engine** by akdevaraj Feb 4Search engine still not functioning!

[p] **Legendre's symbol** by akdevaraj Jan 29(a/p) is the Legendre symbol for quadratic residues and non-residues.
If (a/p) = -1 it means a is not a quadratic residue of p.
Another way of expressing this: the p (under ref ) is an
impossible prime factor of (x^2 - a ).For further examples of this
concept see A123239, A 072936 and A 119691 on OEIS.

[p] **Book** by akdevaraj Jan 26Currently reading "prime numbers - a computational
perspective" by Richard Crandall and Carl Pomerance.
This is a monumental book on prime numbers, primality
testing and factorisation.

[p] **Book** by akdevaraj Jan 26Currently reading "prime numbers - a computational
perspective" by Richard Crandall and Carl Pomerance.
This is a monumental book on prime numbers, primality
testing and factorisation.

[p] **Book** by akdevaraj Jan 26Currently reading "prime numbers - a computational
perspective" by Richard Crandall and Carl Pomerance.
This is a monumental book on prime numbers, primality
testing and factorisation.

[p] **Indirect primality testing** by akdevaraj Jan 24Dear dh2718, thanks for the compliment.

[p] **Indirect primality testing** by akdevaraj Jan 23Dear Permalink-you are right about bio-age; I am 85.

[p] **Indirect primality testing** by akdevaraj Jan 13Dear Peruchio - f(x+k*f(x)) - star means "multiply". k belongs to Z
Thus in this case since f(x) = x^2+x+1, f(x+k*f(x)) means 1 + 3k.
Trust this is clear.

[p] **An Indirect Primality Test** by perucho Jan 9Hi akdevarad, may you please explain me, rigurously, how do the function f(x+K*f(x)) (you don't explain what * means), containing as argument the proper function, could be congruent to 0 (mod f(x))? For sure your sentence needs a lot of rigurous mathematical explanation.

[P] **Indirect primality testing** by akdevaraj 15-12-30Indirect primality testing is not only possible when f(n) =
n^2 +n +1 but also in the cases of several quadratic polynomials
in which the constant term is not large. Further research needs to
be done to establish the relative efficiency of indirect vs
direct primality testing.

[P] **A request to Jussi** by akdevaraj 15-12-24Pl write an article on simple groups.

[P] **Good news** by akdevaraj 15-12-17Happy to inform members that Carl Pomerance has given
qualified support to my concept of indirect primality testing.

[P] **No questions.** by pahio 15-11-10No questions.

[P] **sketch proof - in commonly understood terminology** by akdevaraj 15-11-10I would like to conclude my message with one point:
The fact that any value of n skiped is such that
f(n) is prime can be proved: f(n)=n^2+n+1 is such that
whenever f(n) is composite one of its factors
is smaller than n. This implies that it that the relevant
n has to satisfy a prior failure function.
Any question, Jussi?