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Computational Number Theory is for explicit calculations or algorithms involving anything of interest to number theorists.

25 votes

Why is integer factoring hard while determining whether an integer is prime easy?

Let me give a slightly different example. The Baumslag-Gersten group is a one-relator group with the presentation $\langle a, b \mid [a, a^b] = a\rangle$. This has a Dehn function which grows faster t …
Carl-Fredrik Nyberg Brodda's user avatar