Zander's user avatar
Zander's user avatar
Zander's user avatar
Zander
  • Member for 12 years, 1 month
  • Last seen more than 4 years ago
51 votes
Accepted

Is $2048$ the highest power of $2$ with all even digits (base ten)?

23 votes
Accepted

On the zeta sum $\sum_{n=1}^\infty[\zeta(5n)-1]$ and others

18 votes
Accepted

Is the clustering of prime powers merely coincidental?

17 votes

Find all primes $p$ such that $ p^3-4p+9 $ is a perfect square.

15 votes
Accepted

Why do the Fibonacci numbers recycle these formulas?

14 votes
Accepted

A new formula for Apery's constant and other zeta(s)?

14 votes
Accepted

Complexity class of comparison of power towers

13 votes

Smallest prime of the form 41033333333...?

13 votes
Accepted

Convergence of the sequence $\sqrt{1+2\sqrt{1}},\sqrt{1+2\sqrt{1+3\sqrt{1}}},\sqrt{1+2\sqrt{1+3\sqrt{1+4\sqrt{1}}}},\cdots$

12 votes
Accepted

Solution in integers to $2^n+n=3^m$

12 votes
Accepted

Decimal/hex palindromes: why multiples of 53?

11 votes

Proving the inequality $\frac{\log (1)}{1!}+\frac{\log ^2(2)}{2!}+\frac{\log^3(3)}{3!}+\cdots> \frac{\pi }{4}$

11 votes
Accepted

Are Mersenne numbers $M_p$ deficient?

11 votes
Accepted

Clarkson's Proof of the Divergence of the sum of the reciprocals of the primes

10 votes
Accepted

Is it possible to generalize Ramanujan's lower bound for factorials that he used in his proof of Bertrand's Postulate?

9 votes

Intersection of two parabolae

9 votes
Accepted

Proving :$\frac{1}{2ab^2+1}+\frac{1}{2bc^2+1}+\frac{1}{2ca^2+1}\ge1$

9 votes
Accepted

An interesting table of Prime Generating polynomials similar to $n^2+n+41$?

8 votes
Accepted

proving that $2^{m-1}$ has reminder $1$ when divided by $m$

8 votes

Can an odd perfect number be divisible by $825$?

8 votes

Solve : $x^2-92 y^2=1$

7 votes

Are there prime lengths in triangle with all integer sides and heights?

7 votes
Accepted

Limit of $\sum\frac{1}{p(\pi(n))}$

7 votes
Accepted

Family of GCDs all equal to $2$

7 votes
Accepted

How may I prove this integral inequality?

7 votes

Convergence of Collatz sequences

6 votes
Accepted

Help understanding a $3n+1$ problem programming project

6 votes
Accepted

Integrate $\int_{0}^{1}{x^{-x}(1-x)^{x-1}\sin{\pi x}dx}$

6 votes
Accepted

Cube roots of five

6 votes

A Conjecture about Maximal Prime Gaps

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