List questions from modular-arithmetic

Published on 10 Apr 2026 - 9:01

38

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I need a modular arithmetic theorem or method

Published on 27 Nov 2019 - 17:09

274

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After performing KPA on Hill Cipher the matrix is formed wrong.

Published on 11 Apr 2026 - 22:24

68

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prove that congruence has a solution

Published on 13 Apr 2026 - 4:11

339

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Prime divisors of $n^2-5$

Published on 27 Nov 2019 - 21:30

109

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$x \equiv y \bmod p$ implies $x^{p^{k-1}} \equiv y^{p^{k-1}} \bmod {p^k}$?

Published on 27 Nov 2019 - 23:30

362

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Can $7$ be the smallest prime factor of a repunit?

Published on 09 Apr 2026 - 13:43

260

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Barrett Reduction - Possible without overflow and floating point arithmetic?

Published on 12 Apr 2026 - 16:50

405

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Solve the congruence $M^{49}\equiv 2\pmod{19}$.

Published on 01 Apr 2026 - 2:48

498

Views

How to solve linear congruence with an unknown variable?

Published on 08 Apr 2026 - 21:39

189

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Conjecture: smallest missing mod value always yields previous prime

Published on 25 Mar 2026 - 17:26

41

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Finding the least significant bits in different bases

Published on 11 Apr 2026 - 4:33

49

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Distribution of $p_{n+1}$ rough numbers

Published on 01 Apr 2026 - 10:57

54

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Does Fermat's Little Theorem tell us anything about $a^{\frac{p - 1}{2}}$?

Published on 13 Apr 2026 - 3:58

185

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Solve simultaneous systems of congruences $x\equiv 10 \pmod{60}$ and $x\equiv 80 \pmod{350}$

Published on 28 Mar 2026 - 16:58

List Question

how to solve a quadratic congruence when the modulus is not square-free

I need a modular arithmetic theorem or method

After performing KPA on Hill Cipher the matrix is formed wrong.

prove that congruence has a solution

Prime divisors of $n^2-5$

$x \equiv y \bmod p$ implies $x^{p^{k-1}} \equiv y^{p^{k-1}} \bmod {p^k}$?

Can $7$ be the smallest prime factor of a repunit?

Barrett Reduction - Possible without overflow and floating point arithmetic?

Solve the congruence $M^{49}\equiv 2\pmod{19}$.

How to solve linear congruence with an unknown variable?

Conjecture: smallest missing mod value always yields previous prime

Finding the least significant bits in different bases

Distribution of $p_{n+1}$ rough numbers

Does Fermat's Little Theorem tell us anything about $a^{\frac{p - 1}{2}}$?

Solve simultaneous systems of congruences $x\equiv 10 \pmod{60}$ and $x\equiv 80 \pmod{350}$

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