MathDB
1!+2!+...+n! is a perfect power - [Iran Second Round 1986]

Source:

August 9, 2010
modular arithmeticnumber theorynumber theory unsolved

Problem Statement

Find all positive integers nn for which the number 1!+2!+3!+⋯+n!1!+2!+3!+\cdots+n! is a perfect power of an integer.
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