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Pedja
  • Member for 9 years, 9 months
  • Last seen more than a month ago
64 votes
3 answers
6k views

Chebyshev polynomials of the first kind and primality testing

14 votes
4 answers
1k views

Six points on an ellipse

12 votes
2 answers
915 views

Intersection point of three circles

12 votes
2 answers
633 views

A conjectural infinite series for $\frac{\pi^2}{5\sqrt{5}}$

10 votes
0 answers
623 views

Primality testing using Chebyshev polynomials

10 votes
2 answers
901 views

Primality test for specific class of Proth numbers

9 votes
1 answer
415 views

Conjectured primality test for specific class of $N=4kp^n+1$

9 votes
1 answer
672 views

An infinite series involving harmonic numbers

8 votes
3 answers
1k views

An infinite series that converges to $\frac{\sqrt{3}\pi}{24}$

8 votes
4 answers
2k views

Three circles intersecting at one point

7 votes
1 answer
456 views

Primality test for $N=2^a3^b+1$

7 votes
2 answers
445 views

An infinite series involving the mod-parity of Euler's totient function

6 votes
1 answer
215 views

Necessary and sufficient condition for tangential polygon to be cyclic

6 votes
1 answer
335 views

The square root of natural number expressed by an infinite series

6 votes
1 answer
194 views

Primality test for $N=4p+1$

6 votes
4 answers
522 views

Necessary and sufficient condition for quadrilateral to be cyclic

5 votes
1 answer
327 views

Conjectured primality test for specific class of $N=k \cdot 6^n+1$

5 votes
0 answers
584 views

Primality test for specific class of generalized Fermat numbers

5 votes
1 answer
412 views

Primality test for $2p+1$

4 votes
1 answer
819 views

Primality test similar to the AKS test

4 votes
1 answer
318 views

Primality test for $N=2^mp^n +1$

4 votes
1 answer
179 views

Primality test for specific class of $N=8k \cdot 3^n-1$

4 votes
2 answers
207 views

Six conelliptic points

4 votes
1 answer
539 views

The constant $e$ represented by an infinite series

4 votes
1 answer
1k views

The constant $\pi$ expressed by an infinite series

4 votes
1 answer
286 views

Collinearity in bicentric polygons

4 votes
0 answers
254 views

Four infinite series involving Riemann zeta function

4 votes
1 answer
427 views

Two conjectural infinite series for $\pi$

4 votes
1 answer
190 views

An infinite series involving Jordan's totient function

4 votes
1 answer
211 views

Point of concurrency [closed]