[讨论]大家帮忙看一道prep数学~~多谢大家!!

请教这题的思路......谢谢各位~~~!

for every positive even integer n, the function h(n) is defined to be the product of all the even intergers from 2 to n, inclusive. If p is the smallest prime factor of h(100)+1, then p is :

1,between 2 and 10

2, between 10 and 20

3, between 20 and 30

4, between 30 and 40

5, great than 40

answer is 5, great than 40...

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