3 ms·
I've also heard - but don't remember why - that there's some reason why primes of form 4n+1 would be preferred to primes of form 4n-1, which is why you don't s
by madcaptenor 3y ago
I've also heard - but don't remember why - that there's some reason why primes of form 4n+1 would be preferred to primes of form 4n-1, which is why you don't see 11-year or 19-year cicadas.
- dylan604 3y agoAfter further thinking back on this, it wasn't just survival from predators. It also had to do with the sharing of resources with different broods. At 13/17 combos, the overlap seems to balance out that each brood has the resources to continue with low risk of sharing. Every couple hundred years seems to be far enough that the species is not at risk of competition ending one of the broods.