1×2×3×…… There are 106 zeros at the end of x n, and the maximum value of natural number n is many

1×2×3×…… There are 106 zeros at the end of x n, and the maximum value of natural number n is many

Analysis: if the specific value of n is known, find 1 × 2 × The number of tail zeros of x n is relatively easy to solve. Now we know the number of tail zeros and find the value of N, which is not very easy to deal with. We can first estimate the approximate number of N, and then carefully determine the value of n There are five in × 400