MathDB

11

Part of 1971 IMO Longlists

Problems(1)

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

Source:

8/9/2010
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.
modular arithmeticnumber theorynumber theory unsolved