List questions from elementary-number-theory

Published on 15 Apr 2026 - 22:04

39

Views

When for given $p$ and $n$ we have $p^n \pmod{4}=1$?

Published on 15 Apr 2026 - 18:19

2.1k

Views

Help in understanding why the arithmetic derivative is well-defined.

Published on 09 Apr 2026 - 4:54

98

Views

About Fermat numbers

Published on 09 Apr 2026 - 19:26

178

Views

Find all natural numbers $n$, such that polynomial $n^7+n^6+n^5+1$ would have exactly 3 divisors.

Published on 16 Apr 2026 - 7:00

38

Views

Characterizing a set of numbers that are not dyadic rationals.

Published on 15 Apr 2026 - 15:54

617

Views

Solving $x^2 \equiv 140 \pmod{221}$

Published on 15 Apr 2026 - 23:14

73

Views

How many digits in base 2 do I need to represent any odd integer from 1 to $\sqrt{N}$?

Published on 14 Apr 2026 - 20:40

366

Views

A prime $p$ of the form $4k+1$ implies that $k^k \equiv 1 \mod p$?

Published on 17 Apr 2026 - 1:06

51

Views

Can I efficiently enumerate all numbers in a range that have a prime factor in another given range?

Published on 10 Apr 2026 - 10:11

878

Views

Why can you bring any number back to $9$ by doing this formula?

Published on 14 Apr 2026 - 2:50

197

Views

Upper bound for class number of field

Published on 16 Apr 2026 - 18:14

67

Views

Algebra - Square of natural numbers

Published on 11 May 2026 - 8:35

41

Views

Maximum with different calculation order

Published on 11 Apr 2026 - 12:10

36

Views

simple question regarding divides

Published on 28 Apr 2026 - 9:39

List Question

Prove that $4| \sigma(4k+3)$ for each positive integer $k$

When for given $p$ and $n$ we have $p^n \pmod{4}=1$?

Help in understanding why the arithmetic derivative is well-defined.

About Fermat numbers

Find all natural numbers $n$, such that polynomial $n^7+n^6+n^5+1$ would have exactly 3 divisors.

Characterizing a set of numbers that are not dyadic rationals.

Solving $x^2 \equiv 140 \pmod{221}$

How many digits in base 2 do I need to represent any odd integer from 1 to $\sqrt{N}$?

A prime $p$ of the form $4k+1$ implies that $k^k \equiv 1 \mod p$?

Can I efficiently enumerate all numbers in a range that have a prime factor in another given range?

Why can you bring any number back to $9$ by doing this formula?

Upper bound for class number of field

Algebra - Square of natural numbers

Maximum with different calculation order

simple question regarding divides

Trending Questions

Popular # Hahtags

Popular Questions