# “Random” prime numbers and human projections

“So just what has got mathematicians spooked? Apart from 2 and 5, all prime numbers end in 1, 3, 7 or 9 – they have to, else they would be divisible by 2 or 5 – and each of the four endings is equally likely. But while searching through the primes, the pair noticed that primes ending in 1 were less likely to be followed by another prime ending in 1. That shouldn’t happen if the primes were truly random – consecutive primes shouldn’t care about their neighbour’s digits.”

Source: *Mathematicians shocked to find pattern in “random” prime numbers | New Scientist*

Math, philosophically, is spooky.

Does it “really” exist in the cosmos or is it (like most things we consider to be intrinsic to the universe) a human projection based on our finite nature?