Charles's user avatar
Charles's user avatar
Charles's user avatar
Charles
  • Member for 13 years, 7 months
  • Last seen this week
  • Albany, NY, USA
262 votes

Does $\pi$ contain all possible number combinations?

107 votes
Accepted

Is this of any real importance to the mathematical scientific community?

58 votes

Why does $1/x$ diverge?

34 votes

Is there a known mathematical equation to find the nth prime?

33 votes
Accepted

Determine whether a number is prime

30 votes

Would a proof to the Riemann Hypothesis affect security?

26 votes

Can the golden ratio accurately be expressed in terms of $e$ and $\pi$

25 votes
Accepted

Twin primes of form $2^n+3$ and $2^n+5$

22 votes

How big is infinity?

20 votes

Mathematicians ahead of their time?

17 votes

Fekete's conjecture on repeated applications of the tangent function

16 votes
Accepted

Is there a symbol to mean 'this is undefined'?

16 votes
Accepted

What is the smallest prime of the form $n^n+8$?

15 votes

Is there an intuitionist (i.e., constructive) proof of the infinitude of primes?

15 votes

Do we really know the reliability of PrimeQ[n] (for $n>10^{16}$)?

14 votes
Accepted

What are rational integer coefficients?

14 votes
Accepted

Hardy Ramanujan Asymptotic Formula for the Partition Number

14 votes
Accepted

What does $\mathrm{Re}(x)$ mean?

13 votes
Accepted

How to know if a number is a power of $x$

13 votes
Accepted

Alternatives to arxiv

13 votes

Is there any formula for the series $1 + \frac12 + \frac13 + \cdots + \frac 1 n = ?$

13 votes
Accepted

Why is it so difficult to determine whether or not $\Large \pi^{\pi^{\pi^\pi}}$ is an integer?

12 votes
Accepted

Yet another conjecture about primes

12 votes

What does $\ll$ mean?

12 votes
Accepted

How to check if an integer has a prime number in it?

12 votes

What do $\gg$ and $\ll$ mean?

12 votes

Can a Rubik's cube be mapped knowing only two sides?

12 votes
Accepted

How can I list all numbers relatively prime to X? (but less than X)

11 votes

How to formalize this paradox?

11 votes

How to quickly check if a number is prime?

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