I remember the first Ludum Dare was a 24 hours competition. It became 48 hours in the second iteration and I think that was Ludum Dare 1 about 15+ years ago. How time flies! I participated in the first 48 hours one doing a game in Flash most people were doing games in python, pygame, open gl, C, and C++. I followed closely the later competitions and presented a couple of unfinished work but I played most of the games which used to be about a couple of hundred entries. These days there are thousands of entries and trying them would be a daunting task.
The team and community has been great.
Many Ludum Dare jam games evolved to full games and became hits on the mobile and desktop stores.
I will try to join a competition soon and present a playable game.
Good luck everyone!