REVIEW
Primes between 8th powers?
Number Theory · Submitted 14 Oct 2026 · 18 references
Pith's verdict: Useful conditional note with clean Sections 3–5, but Theorem 6 leans on a Legendre verification treated as an Oppermann verification, so one headline claim is unsupported as written.
T0 · AI review
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Referee report
The paper
The paper claims
If every nontrivial zero of the Riemann zeta function lies at real part 7/8 or below, the paper proves primes must occur between consecutive eighth powers and inside every interval (x, x + x^{7/8}) for x > 1.
The reading
What carries the argument
The carrier of the argument is an explicit pair of two-sided bounds on the Chebyshev functions. From the assumed zero-free half-plane $\operatorname{Re}(s) > 7/8$, a companion preprint supplies $|\psi(x) - x| < 0.04934\,x^{3/4}\ln(x)^2 + 0.02636425\,x^{7/8}$ for $x \ge e^3$; the paper combines this with the elementary estimate $0 < \psi(x) - \vartheta(x) < \sqrt{x}\,\ln(x)^2/(2\ln 2)$ to obtain asymmetric upper and lower bounds on $\vartheta(x)$ (equations 2.4 and 2.5). The mechanism that turns these bounds into primes is monotonicity: whenever the derived lower estimate for $\vartheta(b) - \vartheta(a)$ is positive, at least one prime lies in $(a,b]$, because $\vartheta$ jumps by $\ln p$ exactly at primes. Substituting the four endpoint pairs $((n+1)^8, n^8)$, $(n^8 + 8n^7, n^8)$, $(n^8 + n^7, n^8)$, and $(x + x^{7/8}, x)$, the error terms scale with the interval length at exactly the 7/8 rate, and the constants are small enough that the difference is provably positive for $x \ge 3$, $x \ge 5$, $x \ge 181$, and $x > 1.1222\times 10^{18}$, respectively, after which each remaining finite range is cleared by explicit computation.
Extended reading notes
Core claim
On the paper's own terms, the discovery is a chain of four conditional theorems. Assuming QRH 7/8 — that all nontrivial zeros $\rho$ of the Riemann zeta function satisfy $\operatorname{Re}(\rho) \le 7/8$ — the paper establishes, for all $n \in \mathbb{Z}^+$: $\pi((n+1)^8) > \pi(n^8)$, $\pi(n^8 + 8n^7) > \pi(n^8)$, and $\pi(n^8 + n^7) > \pi(n^8)$, and for all real $x > 1$: $\pi(x + x^{7/8}) > \pi(x)$. Each inequality states that at least one prime exists inside an explicit window; the narrowest integer window has relative length $1/n$, and the real window has relative length $x^{-1/8}$, so all four windows shrink to a vanishing fraction of the location as the numbers grow. The derivation is completely explicit: the hypothesis enters only through a companion preprint's two-sided estimate on the second Chebyshev function $\psi(x)$, which the paper converts into asymmetric bounds on the first Chebyshev function $\vartheta(x)$ and evaluates at the endpoints of each window, with the finite leftover ranges disposed of by direct computation. The paper states plainly that none of this stands without the hypothesis, which it describes as claimed by an unreleased AI-generated preprint collection rather than proved.
Load-bearing premise
Everything rests on the unproven claim called QRH 7/8 — that every nontrivial zero of the Riemann zeta function has real part at most 7/8 — and, within the derivation, Theorem 6 also leans on the assertion that reference [12] verifies the real-variable inequality $\pi(x + \sqrt{x}) > \pi(x)$ for $x$ up to $1.10 \times 10^{27}$, whereas the cited computation in fact verifies Legendre's conjecture for integer $n$, a weaker statement that does not imply the real-variable form the proof requires.
Editorial extensions
If this is right
- If QRH 7/8 is genuine, every gap $(n^8, (n+1)^8)$ provably contains a prime, an eighth-power analogue of Legendre's conjecture, whereas the current unconditional guarantee only reaches consecutive 86th powers.
- Primes are also guaranteed within $n^7$ of $n^8$, a relative window of length $1/n$; for large $n$ this is far shorter than any interval certified unconditionally at such small starting values.
- The real-variable statement $\pi(x + x^{7/8}) > \pi(x)$ for every $x > 1$ would make short-interval prime guarantees uniform and explicit, replacing 'for sufficiently large $x$' with a bound that holds everywhere.
- As a direct corollary, prime gaps would satisfy $p_{k+1} - p_k \le p_k^{7/8}$ for every prime $p_k > 1$; the exponent is weaker than the best asymptotic unconditional results, but the bound would hold for all primes with explicit constants.
Reading between the lines
- The paper leaves implicit that its template is a general conversion: any claimed zero-free half-plane with exponent $\theta$ feeds the same endpoint-difference argument and yields primes in $(x, x + x^\theta)$ for all $x > 1$, so the weaker claimed exponents $11/12$ and $34999/40000$ would give the same theorems with longer windows and shorter computation ranges.
- Not in the paper, but worth stating: the small-number checks are unconditional and could be reproduced on a laptop — nextprime$(n^8) < n^8 + n^7$ for $16 \le n \le 181$, and $\pi(x + x^{7/8}) > \pi(x)$ on a grid over $1 < x \le 10^8$ — and a single failure there would refute the corresponding theorem regardless of the zeta function.
- Read as an algorithm rather than as one result, the paper shows that the exponent of the zero-free half-plane and the exponent of the guaranteed prime window coincide (both 7/8 here); eighth powers are one concrete output, and the really transferable content is the explicit procedure from zero location to prime location.
Original abstract
OpenAI (using a non-public "internal frontier model'') has recently (6 October 2026) made a number of remarkable claims, including some claims regarding the quasi-Riemann hypothesis (QRH). While there are good reasons to be cautious regarding these claims, one can nevertheless ask what (if true) their implications would be. While there is widespread agreement that any version of the QRH will provide various improved bounds on the location of the prime numbers, I feel that there is some value in making these improvements explicit. Specifically, if we assume validity of the claimed 7/8 version of the QRH then I shall demonstrate (for all $n\in \mathbb{Z^+}$): 1) the existence of primes between eighth powers, in the interval $(n^8,(n+1)^8)$; 2) the existence of primes in the shorter interval $(n^8,n^8+8n^7)$; 3) the existence of primes in the even shorter interval $(n^8,n^8+n^7).$ Similarly for reals greater than unity $x>1$ one can demonstrate: 4) the existence of primes in the Hoheisel-style interval $(x,x+x^{7/8})$. All of this is contingent on the validity of the claimed 7/8 version of the QRH.
The compiled record
The paper's own sentences, arranged, kept beside the review and separate from it. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.
The abstract, sentence by sentence
OpenAI (using a non-public "internal frontier model'') has recently (6 October 2026) made a number of remarkable claims, including some claims regarding the quasi-Riemann hypothesis (QRH). While there are good reasons to be cautious regarding these claims, one can nevertheless ask what (if true) their implications would be. While there is widespread agreement that any version of the QRH will provide various improved bounds on the location of the prime numbers, I feel that there is some value in making these improvements explicit. Specifically, if we assume validity of the claimed 7/8 version of the QRH then I shall demonstrate (for all $n\in \mathbb{Z^+}$): 1) the existence of primes between eighth powers, in the interval $(n^8,(n+1)^8)$; 2) the existence of primes in the shorter interval $(n^8,n^8+8n^7)$; 3) the existence of primes in the even shorter interval $(n^8,n^8+n^7).$ Similarly for reals greater than unity $x>1$ one can demonstrate: 4) the existence of primes in the Hoheisel-style interval $(x,x+x^{7/8})$. All of this is contingent on the validity of the claimed 7/8 version of the QRH.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | OpenAI (using a non-public "internal frontier model'') has recently (6 October 2026) made a number of remarkable claims, including some claims regarding the quasi-Riemann hypothesis (QRH). | background 1.00 | 0.04 | 0.02 | asserted 1.00 |
| s1 | While there are good reasons to be cautious regarding these claims, one can nevertheless ask what (if true) their implications would be. | background 0.76 | 0.06 | 0.02 | hedged possibility 0.62 |
| s2 | While there is widespread agreement that any version of the QRH will provide various improved bounds on the location of the prime numbers, I feel that there is some value in making these improvements explicit. | background 0.63 | 0.09 | 0.04 | asserted 0.58 |
| s3 | Specifically, if we assume validity of the claimed 7/8 version of the QRH then I shall demonstrate (for all $n\in \mathbb{Z^+}$): 1) the existence of primes between eighth powers, in the interval $(n^8,(n+1)^8)$; 2) the existence of primes in the shorter interval $(n^8,n^8+8n^7)$; 3) the existence of primes in the even shorter interval $(n^8,n^8+n^7).$ Similarly for reals greater than unity $x>1$ one can demonstrate: 4) the existence of primes in the Hoheisel-style interval $(x,x+x^{7/8})$. | result 0.70 | 0.82 | 0.91 | asserted 0.89 |
| s4 | All of this is contingent on the validity of the claimed 7/8 version of the QRH. | limitation 1.00 | 0.12 | 0.06 | asserted 0.63 |
What was examined, and what was not
- arXiv listing abstract v1
- full text
- figures and tables
- references and citing sentences
- relations to other papers
- P abstract
- S sections
- T body sentences
- C citations
- R cross-paper relations
References
Discussion
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