Using heaps for sieve1 method (didnt improve)
Problem 10 (erlang)
Solved problem 1 (cpp)
Problem 2 solved (cpp)
Problem 3 solved (cpp)
is_prime optimized
is_prime optimized further

using a naive method as seen on http://www.bytehood.com/primality-test/5/
and http://en.wikipedia.org/wiki/Primality_testing