Remark on factorials that are products of factorials

Bhat, KG and Ramachandran, K (2010) Remark on factorials that are products of factorials. In: Mathematical Notes, 88 (3-4). pp. 317-320.

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Abstract

In a paper published in 1993, Erdos proved that if n! = a! b!, where 1 < a a parts per thousand currency sign b, then the difference between n and b does not exceed 5 log log n for large enough n. In the present paper, we improve this upper bound to ((1 + epsilon)/ log 2) log log n and generalize it to the equation a (1)!a (2)! ... a (k) ! = n!. In a recent paper, F. Luca proved that n - b = 1 for large enough n provided that the ABC-hypothesis holds.

Item Type:	Journal Article
Publication:	Mathematical Notes
Publisher:	Springer
Additional Information:	Copyright of this article belongs to Springer.
Keywords:	factorial; product of factorials; Stirling's formula; prime factor
Department/Centre:	Division of Mechanical Sciences > Centre for Atmospheric & Oceanic Sciences
Date Deposited:	14 Dec 2010 10:17
Last Modified:	16 Dec 2018 10:37
URI:	http://eprints.iisc.ac.in/id/eprint/34448

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