List questions from modular-arithmetic

Published on 23 Mar 2026 - 12:07

382

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Why is the order of a multiplicative modulo group divisible by the order of an element in its group?

Published on 01 Apr 2026 - 18:53

109

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Solving $17x+7 \equiv 3 \pmod 6$

Published on 28 Mar 2019 - 18:10

78

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Number theory in Cryptography: Can I say two following subgroups are isomorphic?

Published on 30 Mar 2026 - 15:14

394

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Has $\ 2^{n-1}\equiv 2^{41}+1\mod n\ $ a solution?

Published on 29 Mar 2019 - 10:05

42

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Is there a prime number $p$ such that : $p\bmod n =1 $ for $n <10$? and if yes , Are there infinity of them?

Published on 26 Mar 2026 - 6:08

168

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Finding quadratic residues without Legendre symbols

Published on 26 Mar 2026 - 12:52

104

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Find $\gcd(a^{2^n}+1,a^{2^m}+1)$ where $m,n$ are two distinct positive integers.

Published on 26 Mar 2026 - 21:27

45

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Cryptography/modulus equations help

Published on 30 Mar 2019 - 18:09

330

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$ord_p(a)=2 \iff a\equiv -1 \mod p$

Published on 30 Mar 2019 - 22:51

91

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Question about Modular Arithmetic

Published on 26 Mar 2026 - 23:00

68

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Find all non-trivial congruence relations on $(\mathbb{Z},+,0,-)$.

Published on 25 Mar 2026 - 3:07

56

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Mega-modular exponentiation

Published on 31 Mar 2019 - 14:56

363

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Find all positive integers $n$ such that $\frac{3^n-1}{2^n}$ is an integer.

Published on 31 Mar 2019 - 16:41

134

Views

What does $\mathbb{C} / \mathbb{Z}$ mean?

Published on 31 Mar 2019 - 17:42

List Question

Clarification about Carmichael's Lambda Function

Why is the order of a multiplicative modulo group divisible by the order of an element in its group?

Solving $17x+7 \equiv 3 \pmod 6$

Number theory in Cryptography: Can I say two following subgroups are isomorphic?

Has $\ 2^{n-1}\equiv 2^{41}+1\mod n\ $ a solution?

Is there a prime number $p$ such that : $p\bmod n =1 $ for $n <10$? and if yes , Are there infinity of them?

Finding quadratic residues without Legendre symbols

Find $\gcd(a^{2^n}+1,a^{2^m}+1)$ where $m,n$ are two distinct positive integers.

Cryptography/modulus equations help

$ord_p(a)=2 \iff a\equiv -1 \mod p$

Question about Modular Arithmetic

Find all non-trivial congruence relations on $(\mathbb{Z},+,0,-)$.

Mega-modular exponentiation

Find all positive integers $n$ such that $\frac{3^n-1}{2^n}$ is an integer.

What does $\mathbb{C} / \mathbb{Z}$ mean?

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