MathDB

8

Part of 1987 IMO Longlists

Problems(1)

The least positive integer n

Source:

9/5/2010
Determine the least possible value of the natural number nn such that n!n! ends in exactly 19871987 zeros.
[hide="Note"]Note. Here (and generally in MathLinks) natural numbers supposed to be positive.
number theory unsolvednumber theory