List questions from elementary-number-theory

Published on 13 Apr 2026 - 16:52

131

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distribution of prime numbers in special range

Published on 13 Apr 2026 - 23:54

84

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Polynomials giving integer outputs

Published on 11 Apr 2026 - 8:11

224

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Proof that $n$ is a positive odd integer if $5n + 6$ is odd

Published on 12 Apr 2026 - 0:40

48

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Can we have negative modulo in modular arithmetic?

Published on 10 Apr 2026 - 3:01

833

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Composition of 2 modulo functions

Published on 09 Apr 2026 - 3:52

257

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Condition for primeness of a degree 2 Solinas Prime

Published on 12 Apr 2026 - 1:16

1.2k

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Prove that $n$ is prime iff $\sigma(n)+\phi(n)= nd(n)$.

Published on 14 Apr 2026 - 19:41

268

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Solving a linear congruence with no common factor?

Published on 13 Apr 2026 - 9:18

24

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Can $(x-1)(y+1)+xy$ be a Fermat-pseudoprime , when $x$ is a power of $2$ and $y$ a power of $10$?

Published on 25 Mar 2026 - 12:50

212

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Simplifying powers in a congruence

Published on 12 Apr 2026 - 5:04

78

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Prove that $n$ is divisible by $6$.

Published on 11 Apr 2026 - 2:34

119

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Is $(q^k n^2 \text{ is perfect }) \iff (D(q^k)D(n^2) = 2s(q^k)s(n^2))$ only true for odd perfect numbers $q^k n^2$?

Published on 17 Apr 2026 - 9:29

1k

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Why are integer GCDs positive? [unit normalization of GCDs]

Published on 14 Apr 2026 - 9:48

142

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What is the common (and simplified) value for $D(q^k)D(n^2) = 2s(q^k)s(n^2)$ when $q^k n^2$ is an odd perfect number?

Published on 25 Mar 2026 - 6:06

List Question

Infinitely Many Non-Sierpinski Numbers?

distribution of prime numbers in special range

Polynomials giving integer outputs

Proof that $n$ is a positive odd integer if $5n + 6$ is odd

Can we have negative modulo in modular arithmetic?

Composition of 2 modulo functions

Condition for primeness of a degree 2 Solinas Prime

Prove that $n$ is prime iff $\sigma(n)+\phi(n)= nd(n)$.

Solving a linear congruence with no common factor?

Can $(x-1)(y+1)+xy$ be a Fermat-pseudoprime , when $x$ is a power of $2$ and $y$ a power of $10$?

Simplifying powers in a congruence

Prove that $n$ is divisible by $6$.

Is $(q^k n^2 \text{ is perfect }) \iff (D(q^k)D(n^2) = 2s(q^k)s(n^2))$ only true for odd perfect numbers $q^k n^2$?

Why are integer GCDs positive? [unit normalization of GCDs]

What is the common (and simplified) value for $D(q^k)D(n^2) = 2s(q^k)s(n^2)$ when $q^k n^2$ is an odd perfect number?

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