New posts in Arithmetic Progressions

Prove that $n$ is also a power of $2$.

If there is one perfect square in an arithmetic progression, then there are infinitely many

Is there a primitive recursive function which gives the nth digit of $\pi$, despite the table-maker's dilemma?

I derived a new formula related to arithmetic sequences, I think!

Consecutive integers sum with different steps

Arithmetic and Geometric Progression Question 1

How to find a general sum formula for the series: 5+55+555+5555+.....?

Infinitely many primes of the form $4n+3$

How can we sum up $\sin$ and $\cos$ series when the angles are in arithmetic progression?

Dirichlet's theorem on primes in arithmetic progression