This one is SUPER simple...
Using a HUGE pot of filtered water (I use a 20 gallon pot)...
Pour in peanuts
Cover with water, then add several more inches above that
(The peanuts will float so this is approximate, but since a lot of water will boil off, you want a LOT of water in there)
Add 2 tbsp salt to the water
Bring pot to a boil
Reduce to low and cook covered 5-6 hours
Scoop them out, let them cool, then eat!
They keep in the fridge for 1 week