Bojan Vasiljević
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### Questions (9)

 2 What is the fastest or usual way to calculate $(\frac{x-1}{2})^2$ mod $x$ if $x$ is odd? 1 $5n+1$, $3n-1$ problem, smallest repeating cycle and Collatz conjecture 1 $N \equiv 3 (\textrm{mod } 4)$ and Collatz conjecture 1 How difficult is to find x for x^2 mod N = a, where a = 1? 1 Euler's sieve and wheel factorization

### Reputation (57)

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 1 Given the factors of $N$, is there a method for computing the factors of $N-1$ or $N+1$? 1 Is a prime factor of a number always less than its square root?

### Tags (12)

 2 number-theory × 3 0 recreational-mathematics × 2 1 prime-numbers × 2 0 modular-arithmetic × 2 1 prime-factorization 0 residue-calculus 1 inequality 0 elementary-number-theory 0 collatz × 2 0 algebra-precalculus

### Accounts (3)

 Mathematics 57 rep 9 Physics 11 rep 4 Cryptography 1 rep 1