Hi Friends! Sorry if this was already mentioned. You perhaps know that ProjectEuler was hacked again recently and was shut down for almost a week (since 2 to 7 of August 2015).

It is now back, but Mr. Euler stated they failed to determine how the site was hacked and ask for people skilled in vulnerability hunting to help.

Here is his post in the news: https://projecteuler.net/news

And here are few details about the recent troubles: http://forum.projecteuler.net/viewtopic.php?f=5&t=3937