n0nChun
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### Questions (5)

 4 Calculating the residue of power towers 2 When is the sum of divisors a prime? 2 Unique solutions for $ab = n ^ 2$ 1 Modulo of (Power of 2 divided by a number) 1 Number of distinct points at which runners meet.

### Reputation (155)

 +20 Calculating the residue of power towers +5 When is the sum of divisors a prime? +5 Modulo of (Power of 2 divided by a number) +5 Number of distinct points at which runners meet.

 0 how can one solve for $x$, $x =\sqrt{2+\sqrt{2+\sqrt{2\cdots }}}$

### Tags (11)

 0 modular-arithmetic × 2 0 diophantine-equations 0 elementary-number-theory × 2 0 divisor-sum 0 exponentiation × 2 0 prime-numbers 0 algebra-precalculus × 2 0 puzzle 0 nested-radicals 0 tetration

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