List questions from congruences

Published on 25 Mar 2026 - 21:22

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Question about how to prove $x^5\equiv x \pmod {10}$

Published on 27 Dec 2014 - 0:37

101

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Quadratic congruences in which modulus is divisible by constant term

Published on 27 Dec 2014 - 2:57

981

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Flaw or no flaw in MS Excel's RNG?

Published on 26 Mar 2026 - 9:40

57

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About primitive roots of $p$ less than $\frac{p-1}2$.

Published on 25 Mar 2026 - 21:22

763

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Using induction to prove a congruence?

Published on 27 Dec 2014 - 11:27

143

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Elementary properties of modular addition and multiplication

Published on 29 Dec 2014 - 12:01

337

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Determine which quadratic congruences have solutions

Published on 29 Dec 2014 - 18:04

73

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About a variation of the primitive root idea.

Published on 25 Mar 2026 - 21:22

154

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Proving $310 \mid n^{121}-n$ for all integers $n$

Published on 02 Jan 2015 - 11:53

157

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Bounding solutions of a diophantine equation

Published on 25 Mar 2026 - 23:36

41

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Does the equation $2^n \equiv r \bmod n$ have solution?

Published on 25 Mar 2026 - 19:02

75

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Proof about prime factors: every prime factor of $4n^2+1$ is congruent to $1 \pmod 4$.

Published on 09 Jul 2016 - 23:32

110

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Question on proof regarding solvability of congruences modulo powers of 2

Published on 11 Jul 2016 - 20:22

1.1k

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When a congruence system can be solved?

Published on 12 Jul 2016 - 9:41

List Question

About primitive roots and ways of expressing them.

Question about how to prove $x^5\equiv x \pmod {10}$

Quadratic congruences in which modulus is divisible by constant term

Flaw or no flaw in MS Excel's RNG?

About primitive roots of $p$ less than $\frac{p-1}2$.

Using induction to prove a congruence?

Elementary properties of modular addition and multiplication

Determine which quadratic congruences have solutions

About a variation of the primitive root idea.

Proving $310 \mid n^{121}-n$ for all integers $n$

Bounding solutions of a diophantine equation

Does the equation $2^n \equiv r \bmod n$ have solution?

Proof about prime factors: every prime factor of $4n^2+1$ is congruent to $1 \pmod 4$.

Question on proof regarding solvability of congruences modulo powers of 2

When a congruence system can be solved?

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