List questions from modular-arithmetic

Published on 15 Feb 2019 - 10:19

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Calculate fictional moon position in the sky

Published on 15 Feb 2019 - 23:42

64

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Understanding this proof regarding quadratic residues

Published on 26 Mar 2026 - 12:58

164

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show $p\mid 2^n-n$ for infinitely many $n$

Published on 17 Feb 2019 - 9:50

48

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if $n_{3}\equiv1\pmod3$ and $n_{3}\mid7$ then $n_{3}\in \{1,7\}$

Published on 17 Feb 2019 - 13:38

313

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Modular multiplicative inverse proof

Published on 17 Feb 2019 - 17:00

56

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$a^2 \equiv 1 \pmod{311}$

Published on 18 Feb 2019 - 9:11

258

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Modular geometry: The parabolas of quadratic residues modulo $p$

Published on 25 Mar 2026 - 8:08

523

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Proofs with Modulo Operation

Published on 18 Feb 2019 - 11:53

79

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Can you propose a theorem from these congruences?

Published on 26 Mar 2026 - 12:06

60

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Hard congruence equation with large residual.

Published on 18 Feb 2019 - 20:21

63

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Powers of primes mod n having period two

Published on 19 Feb 2019 - 1:13

221

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Swapping numbers in congruence

Published on 19 Feb 2019 - 9:10

154

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About gaps between prime numbers

Published on 19 Feb 2019 - 18:46

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Let $G=\{n \in \Bbb N \mid n\leq 55 , \; \gcd(n,55)=1\}$ be the group under multiplication modulo $55$. Find $x$ is $x^2=26$ and $x>30$

Published on 20 Feb 2019 - 12:10

List Question

Dividing both sides of congruence

Calculate fictional moon position in the sky

Understanding this proof regarding quadratic residues

show $p\mid 2^n-n$ for infinitely many $n$

if $n_{3}\equiv1\pmod3$ and $n_{3}\mid7$ then $n_{3}\in \{1,7\}$

Modular multiplicative inverse proof

$a^2 \equiv 1 \pmod{311}$

Modular geometry: The parabolas of quadratic residues modulo $p$

Proofs with Modulo Operation

Can you propose a theorem from these congruences?

Hard congruence equation with large residual.

Powers of primes mod n having period two

Swapping numbers in congruence

About gaps between prime numbers

Let $G=\{n \in \Bbb N \mid n\leq 55 , \; \gcd(n,55)=1\}$ be the group under multiplication modulo $55$. Find $x$ is $x^2=26$ and $x>30$

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