
New record prime: 2^{74,207,281}1 with 22,338,618 digits by Cooper, Woltman, Kurowski, Blosser & GIMPS (7 Jan 2016). 

The Prime Pages have a variety of information related to primes. This includes (perhaps unbelievably) methods to listen to primes and prime factorizations, which I am attempting to index here. 
Another prime page by Chris K. Caldwell <caldwell@utm.edu> 