English

On the complete solutions of a generalized Lebesgue-Ramanujan-Nagell equation

Number Theory 2025-10-28 v2

Abstract

We consider the generalized Lebesgue-Ramanujan-Nagell equation x2+17k4159m=2δynx^2+17^k41^\ell 59^m=2^\delta y^n in the unknown integers x1,y>1,n3x\geq 1, y>1,n\geq 3 and k,,m0k, \ell, m\geq 0 satisfying gcd(x,y)=1\gcd(x,y)=1. We first find all the integer solutions of the above equation, and then use this result to determine all the integer solutions of some other Lebesgue-Ramanujan-Nagell type equations. Our method uses the classical results of Bilu, Hanrot and Voutier on existence of primitive divisors of Lehmer sequences in combination with number theoretic arguments and computer search.

Keywords

Cite

@article{arxiv.2105.02832,
  title  = {On the complete solutions of a generalized Lebesgue-Ramanujan-Nagell equation},
  author = {Kalyan Chakraborty and Azizul Hoque},
  journal= {arXiv preprint arXiv:2105.02832},
  year   = {2025}
}

Comments

15 pages. Incorporated some comments/suggestions made by referees. To appear in `Quaestiones Mathematicae'