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arXiv · 1903.08370

Explicit Bounds For The Diophantine Equation A!B! = C!

Laurent Habsieger
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Abstract

A nontrivial solution of the equation A!B! = C! is a triple of positive integers (A, B, C) with A $\le$ B $\le$ C -- 2. It is conjectured that the only nontrivial solution is (6, 7, 10), and this conjecture has been checked up to C = 10 6. Several estimates on the relative size of the parameters are known, such as the one given by Erd{\"o}s C -- B $\le$ 5 log log C, or the one given by Bhat and Ramachandra C --B $\le$ (1/ log 2+o(1)) log log C. We check the conjecture for B $\le$ 10 3000 and give better explicit bounds such as C -- B $\le$ log log(B+1) log 2 -- 0.8803.

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Laurent Habsieger. 2019-03-20. Explicit Bounds For The Diophantine Equation A!B! = C!. https://arxiv.org/abs/1903.08370

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