I think, here, I found $$P_x(s)=\sum_{p < x} \frac{1}{p^s} =\sum_{n=1}^{\infty}\frac{ \mu (n)}{n} \sum_{z\in{1,\rho}}(-1)^{1-\delta_{1z}} \left[ {\rm li}(t^{\frac zn-s}) \right]^{x}_2 \tag{7}$$

where $\rho$ are all the zeros (trivial and non-trivial) of $\zeta$ function. See the linked question for more detail, corrections are welcome. Further we know, that $$P(s)=\sum_{n> 0}\frac {\mu(n)}n{\log\zeta(ns)} .$$

So my question is

If $\lim_{x\to \infty} P_x(s)=P(s)$ then $$\log\zeta(ns)=\lim_{x\to \infty} \sum_{z\in{1,\rho}}(-1)^{1-\delta_{1z}} \left[ {\rm li}(t^{\frac1n( z-ns)}) \right]^{x}_2 ?$$

What I got so far is:

• Could $\displaystyle \log \zeta(s) = s \int_0^\infty \frac{\pi(x)}{x(x^s-1)}\,dx$ be useful somehow?

• Thanks to robjohn it possible to see that both coincide at least some special values:
If $ns=1$ or $ns=\rho$, one addend in the sum diverges like $\lim_{x\to\infty} \log\left(\frac{\log(x)}{\log(2)}\right)=\infty$. So we get $$\begin{eqnarray} ns=1\to ns=1: & \log(\zeta(1)) &=& +\infty \ ; \infty\ ns=\rho\to : & \log(\zeta(\rho)) &=& -\infty \end{eqnarray}$$

• I looked at the series expansion at $s=0$ for ${\rm li}(x^{\frac1n(z-ns)})=$ ${\rm Ei}((\frac zn-s)\ln(x))$ and $\log\zeta(ns)$. Assuming I'm not wrong, you'll get the following when you compare the linear terms $$\color{grey}{ins}\log(2\pi) \overset{?}{=} \color{grey}{ins} \lim_{x\to \infty}\sum_{z\in{1,\rho}}(-1)^{\delta_{1z}} \left[ \frac{ t^{\frac{z}n}}{z}\right]_2^x ,$$ which looks a little irritating, since the RHS has to be independent of $x$ an $n$. Does this show that it's wrong at all?

9 added 411 characters in body

I think, here, I found $$P_x(s)=\sum_{p < x} \frac{1}{p^s} =\sum_{n=1}^{\infty}\frac{ \mu (n)}{n} \sum_{z\in{1,\rho}}(-1)^{1-\delta_{1z}} \left[ {\rm li}(t^{\frac zn-s}) \right]^{x}_2 \tag{7}$$

where $\rho$ are all the zeros (trivial and non-trivial) of $\zeta$ function. See the linked question for more detail, corrections are welcome. Further we know, that $$P(s)=\sum_{n> 0}\frac {\mu(n)}n{\log\zeta(ns)} .$$

So my question is

If $\lim_{x\to \infty} P_x(s)=P(s)$ then $$\log\zeta(ns)=\lim_{x\to \infty} \sum_{z\in{1,\rho}}(-1)^{1-\delta_{1z}} \left[ {\rm li}(t^{\frac1n( z-ns)}) \right]^{x}_2 ?$$

Could $\displaystyle \log \zeta(s) = s \int_0^\infty \frac{\pi(x)}{x(x^s-1)}\,dx$ be useful somehow?

Thanks to robjohn it possible to see that both coincide at least some special values:

If $ns=1$ or $ns=\rho$, one addend in the sum diverges like $\lim_{x\to\infty} \log\left(\frac{\log(x)}{\log(2)}\right)=\infty$. So we get $$\begin{eqnarray} ns=1\to & \log(\zeta(1)) &=& +\infty \ ; ns=\rho \to & \log(\zeta(\rho)) &=& -\infty \end{eqnarray}$$

8 added 108 characters in body

I think, here, I found $$P_x(s)=\sum_{p < x} \frac{1}{p^s} =\sum_{n=1}^{\infty}\frac{ \mu (n)}{n} \sum_{z\in{1,\rho}}(-1)^{1-\delta_{1z}} \left[ {\rm li}(t^{\frac zn-s}) \right]^{x}_2 \tag{7}$$

where $\rho$ are all the zeros (trivial and non-trivial) of $\zeta$ function. See the linked question for more detail, corrections are welcome. Further we know, that $$P(s)=\sum_{n> 0}\frac {\mu(n)}n{\log\zeta(ns)} .$$

So my question is

If $\lim_{x\to \infty} P_x(s)=P(s)$ then $$\log\zeta(ns)=\lim_{x\to \infty} \sum_{z\in{1,\rho}}(-1)^{1-\delta_{1z}} \left[ {\rm li}(t^{\frac zn-s}li}(t^{\frac1n( z-ns)}) \right]^{x}_2 ?$$

Could $\displaystyle \log \zeta(s) = s \int_0^\infty \frac{\pi(x)}{x(x^s-1)}\,dx$ be useful somehow?

7 greater missing
6 corrected flaw; deleted 185 characters in body
5 added 197 characters in body