I cant find the largest prime divisor of 11! + 12!.

can anyone help?

Hello Guest!

12! = 11! * 12

We can factor 11! + 12! to 11!(1 + 12).

1+ 12 = 13

11! + 12! = 11!*13

Thus, 13 is the largest prime factor. :)

I hope this helped. :D

=^._.^=

Thank you!

Very nice, catmg !!!