List questions from open-problem

Published on 24 Apr 2013 - 12:36

22.8k

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Is "P vs NP" problem solved?

Published on 03 May 2013 - 21:17

168

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A Problem on Time Complexity of Algorithms

Published on 06 May 2013 - 18:25

966

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Any proof to $\pi^{e}$'s irrationality?

Published on 08 May 2013 - 17:01

1k

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How many points can you find on $y=x^2$, for $x \geq 0$, such that each pair of points has rational distance?

Published on 21 May 2013 - 20:32

139

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Are there infinitely many primes $p_k$ such that $(p_k-1)!+p_k$ is a also prime?

Published on 27 May 2013 - 12:28

907

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Famous Problems Where We Only Know the Elementary

Published on 30 May 2013 - 18:04

113

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Are there infinitely many semi primes of the form $x^2 + 2x$ for integral $x$?

Published on 13 Jun 2013 - 3:57

216

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Are there any perfect numbers which are also powerful?

Published on 13 Jun 2013 - 11:03

291

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Is Paley-13 graph a unit distance graph in 3D space?

Published on 26 Jun 2013 - 16:57

375

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Biggest Little Polyhedron

Published on 01 Jul 2013 - 21:37

848

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Odd perfect squares whose decimal representation consist only of 1's and o's

Published on 05 Jul 2013 - 22:47

647

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Throw a die three times, and get maximum number of different sums.

Published on 10 Jul 2013 - 18:49

2.1k

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The value of $\sqrt{1-\sqrt{1+\sqrt{1-\sqrt{1+\cdots\sqrt{1-\sqrt{1+1}}}}}}$?

Published on 11 Jul 2013 - 18:25

614

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$\tan (n) > n$ for infinitely many positive integers

Published on 27 Jul 2013 - 4:17

List Question

Has anyone found a "pattern" in prime numbers?

Is "P vs NP" problem solved?

A Problem on Time Complexity of Algorithms

Any proof to $\pi^{e}$'s irrationality?

How many points can you find on $y=x^2$, for $x \geq 0$, such that each pair of points has rational distance?

Are there infinitely many primes $p_k$ such that $(p_k-1)!+p_k$ is a also prime?

Famous Problems Where We Only Know the Elementary

Are there infinitely many semi primes of the form $x^2 + 2x$ for integral $x$?

Are there any perfect numbers which are also powerful?

Is Paley-13 graph a unit distance graph in 3D space?

Biggest Little Polyhedron

Odd perfect squares whose decimal representation consist only of 1's and o's

Throw a die three times, and get maximum number of different sums.

The value of $\sqrt{1-\sqrt{1+\sqrt{1-\sqrt{1+\cdots\sqrt{1-\sqrt{1+1}}}}}}$?

$\tan (n) > n$ for infinitely many positive integers

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