I discovered how RSA works only recently, but I wonder how long would it take for NSA to decrypt a RSA cypher. If people can do that in an academic environment,

I discovered how RSA works only recently, but I wonder how long would it take for NSA to decrypt a RSA cypher. If people can do that in an academic environment, then I think we don't have to worry that NSA can't decrypt messages, because they are probably doing it more quickly.