Toroczkai's existence conjecture for prime gap graphs

From papers

Let pnp_n be the nn-th prime, with p0=1p_0=1, and let

PDn=(pp1)=1n\mathrm{PD}_n=\left(p_{\ell}-p_{\ell-1}\right)_{\ell=1}^{n}

be the first nn prime gap sequence. A prime gap graph on n2n\geq 2 vertices is a simple graph whose vertex degrees are exactly the entries of PDn\mathrm{PD}_n. Toroczkai's existence conjecture. For every n2n\geq 2, there exists a prime gap graph on nn vertices.

The conjecture asserts graphicality of every finite initial segment of the prime gap sequence; the paper establishes explicit unconditional graphicality only beyond a very large threshold, so the full assertion remains open.

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Sources & referencesView supporting material

Primary source

Keshav Aggarwal, Robin Frot, Haozhe Gou and Hui Wang, “Explicit bounds for the graphicality of the prime gap sequence”, arXiv:2512.24230 (2026).

Additional references

2 papers in this index state this conjecture (2022–2025). The statement above is taken from the most recent of them; the others are arXiv:2205.00580.

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