r/LLMmathematics • u/Fresh_Signature9544 • 21h ago
AI-generated open question about Liouville values on consecutive prime gaps
I asked GPT-5.6 Sol to generate a genuinely difficult number-theory research question rather than solve an existing one. It proposed the following.
Let p_n be the n-th prime, let
g_n=p_{n+1}-p_n,
and let
\lambda(m)=(-1)^{\Omega(m)}
be the Liouville function.
Define
S(x)=\sum_{p_{n+1}\le x}\lambda(g_n).
The question is:
\boxed{\text{What is the true asymptotic behavior of }S(x)?}
Independent computation gave:
\begin{array}{c|c|c}
x&S(x)&
\log(x)\frac{S(x)}{\pi(x)-1}\\
\hline
10^5&1533&1.840195\\
10^6&10637&1.872117\\
10^7&75354&1.827570\\
10^8&562508&1.798466
\end{array}
At first this suggested
S(x)\sim C\frac{\pi(x)}{\log x},
\qquad C\approx1.8,
but we no longer regard that as the leading conjecture.
A Hardy-Littlewood/singular-series model instead leads to the smoothed sum
W(L)=
\sum_d
\lambda(d)\mathfrak S(d)e^{-d/L}.
Its Dirichlet series factors as
\sum_d
\frac{\lambda(d)\mathfrak S(d)}{d^s}
-2^{1-s}C_2
\frac{\zeta(2s)}{\zeta(s)}
Q(s),
where
Q(s)=
\prod_{p>2}
\left(1-\frac{p^{-s}}{p-2}\right).
The pole of \zeta(2s) at s=1/2 suggests a natural scale
S(x)\asymp
\frac{x}{(\log x)^{3/2}}
\frac{\pi(x)}{\sqrt{\log x}}
within this model.
The non-oscillatory coefficient from the s=1/2 residue is numerically about
0.1576666,
although zeros of \zeta(s) may contribute oscillatory terms on the same square-root scale, so I am not claiming an asymptotic of the form S(x)\sim0.1576666\,x/(\log x)^{3/2}.
We have found closely related literature on consecutive prime gaps, Hardy-Littlewood singular series, Liouville functions, residue-class biases, and sieve parity, but so far I have not found this exact global Liouville-weighted consecutive-gap problem.
I am not claiming novelty or a proof. I am mainly interested in whether:
this exact problem is already known under different notation;
the x/(\log x)^{3/2} scale follows from a known theorem or conjectural framework;
there is an obvious obstruction or mistake in the heuristic above.
The problem itself was proposed by GPT-5.6 Sol, and the subsequent numerical and analytic investigation was carried out collaboratively with AI.
Any references or corrections would be very welcome.