https://arxiv.org/abs/1811.09840
https://www.khanacademy.org/computing/computer-science/cryptography/comp-number-theory/v/sieve-of-eratosthenes-prime-adventure-part-4
http://web.mit.edu/~simsong/www/ugh.pdf
http://catb.org/~esr/writings/taoup/html/ch01s01.html
https://lainzine.neocities.org/all-releases/lainzine04.pdf
https://www.youtube.com/watch?v=LFwSIdLSosI