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

5 votes

Modular square roots problem which is $NP$ hard

According to the paper NP-complete decision problems for quadratic polynomials (Thm. 2) by K. Manders and L. Adleman the following problem $A$ is NP-complete thus in particular NP-hard: Given $\alpha, …
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