Quote Originally Posted by David F View Post
You're missing the !. With the ! it says "expression required too much memory to evaluate". (For me, at any rate).
Ah right. In your link the "!" was outside....

http://gmplib.org/cgi-bin/gmp_calc.pl?expr=2000000!

The result of executing 2000000! is:

computation took 1526 ms
result is about 11733474 digits, not printing it