The periodic cicadas have evolved reproductive cycle lengths with prime number patterns; since prime numbers have no common multiples,it's very unlikely that high predator densities will correspond with a hatching event.

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This is true. The periodic cicadas have evolved reproductive cycle lengths with prime number patterns, such as 13, 17, and 19 years. Since prime numbers have no common multiples, it is very unlikely that high predator densities will correspond with a hatching event. This may be an evolutionary strategy to avoid synchronized and predictable hatching events that predators could easily target.

The Periodic Cicadas Have Evolved Reproductive Cycle Lengths with Prime