List questions from modular-arithmetic

Published on 26 Mar 2026 - 4:34

104

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How to isolate $A$ in $A\%B=C$

Published on 14 Apr 2018 - 3:03

106

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What does it mean for $\sigma^N$≡$\sigma^e$ (mod N) for arbitrary a?

Published on 25 Mar 2026 - 4:37

1.3k

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Is it possible to find a closed-form expression for $f(n)$?

Published on 22 Mar 2026 - 15:02

201

Views

Prove that $24n+5$ can't be a perfect square with $n \in \Bbb Z^+$

Published on 25 Mar 2026 - 4:41

96

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Finding the number of multiple of $3$ in the coefficients of $x(x+1)(x+2)\cdots (x+239)$

Published on 15 Apr 2018 - 9:13

92

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Find the inverse of $359 \bmod 457.$

Published on 25 Mar 2026 - 12:55

59

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How to show that $n$ is composite.

Published on 16 Apr 2018 - 21:23

189

Views

Calculate distance between a value and a multiple of an interval

Published on 23 Mar 2026 - 9:37

80

Views

In proving that $\sqrt{a}$ is always irrational, $\forall a\in\left\{\Bbb R^+ : 1< a\neq b^2\right\}$... a different way.

Published on 18 Apr 2018 - 10:38

49

Views

Prove that the function $f(\bar{z})=e^{2\pi i z}$ is well-defined and that it is a group-homomorphism

Published on 25 Mar 2026 - 11:14

184

Views

Is there a pattern in the sequence $l_1,l_2,l_3,\ldots$?

Published on 25 Mar 2026 - 13:05

938

Views

Proof that $\Bbb{Z}_p$ is a field if $p$ is a prime (without Ring theory)

Published on 25 Mar 2026 - 13:04

200

Views

El Gamal: solve "a" for "h = g^a (mod p)"

Published on 25 Mar 2026 - 12:48

196

Views

Find the last $3$ digits of $13^{1201}$.

Published on 19 Apr 2018 - 18:44

List Question

Why does the product of all the elements in $\mathbb{Z} _{m}^{*} $ equal to $\pm {1} \mod{m}$?

How to isolate $A$ in $A\%B=C$

What does it mean for $\sigma^N$≡$\sigma^e$ (mod N) for arbitrary a?

Is it possible to find a closed-form expression for $f(n)$?

Prove that $24n+5$ can't be a perfect square with $n \in \Bbb Z^+$

Finding the number of multiple of $3$ in the coefficients of $x(x+1)(x+2)\cdots (x+239)$

Find the inverse of $359 \bmod 457.$

How to show that $n$ is composite.

Calculate distance between a value and a multiple of an interval

In proving that $\sqrt{a}$ is always irrational, $\forall a\in\left\{\Bbb R^+ : 1< a\neq b^2\right\}$... a different way.

Prove that the function $f(\bar{z})=e^{2\pi i z}$ is well-defined and that it is a group-homomorphism

Is there a pattern in the sequence $l_1,l_2,l_3,\ldots$?

Proof that $\Bbb{Z}_p$ is a field if $p$ is a prime (without Ring theory)

El Gamal: solve "a" for "h = g^a (mod p)"

Find the last $3$ digits of $13^{1201}$.

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