The current key used for email, package signing etc. is :
pub rsa4096 2015-09-19 [SC] [expires: 2030-12-31]
37DB 18EE 7668 BDA4 1D66 1DB7 B91A 917F CD37 55FB
uid Georg Lutz <georg@georglutz.de>
uid Georg Lutz <georg-com@georglutz.de>
uid Georg Lutz <georg-list@georglutz.de>
uid Georg Lutz <georglutz@gmx.de>
sub rsa4096 2015-09-19 [E] [expires: 2030-12-31]
Either fetch it from a public keyserver or download it here.