PHP integer exponentiation (super large numbers)

Question

Using PHP I want to do millions of 2^n exponentiation but so far I only got up to n^1023 before PHP printed INF.

Any ideas?

Answer 1

You can use the BC Math functions:

  $num = bcpow(2, 1000000); // Takes a few seconds to run!

Answer 2

As Greg said, BC Math is fine, but if you really need efficiency, try GMP instead.