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**k-th "Twin prime"...**

Is not there a formula for the k-th "twin prime" ?..as far as i know for the normal primes satisfying "Wilson's theorem":

[tex] (p-1)!+1=mod(p) [/tex] you can get an "exact" (but difficul to compute) formula in the form:

[tex] p_k = \sum_{n=2}^{2^{k}}(\frac{k}{1+\pi(n)})^{1/n} [/tex] or similar..

But Why is not there this formula for the "twin primes" ? in fact they also satisfy a congruence....:grumpy: