Mr. Brooks's user avatar
Mr. Brooks's user avatar
Mr. Brooks's user avatar
Mr. Brooks
  • Member for 9 years, 7 months
  • Last seen more than 4 years ago
  • Detroit, Michigan
14 votes

What is $0\div0\cdot0$?

13 votes

Why is $\mathbb{Z}[\sqrt{-n}], n\ge 3$ not a UFD?

11 votes

How to prove that all odd powers of two add one are multiples of three

10 votes

When are quadratic rings of integers unique factorization domains?

9 votes

Is 2014411 Prime?

8 votes

Prime numbers the rank of which is also a prime.

8 votes

Is the sum of two distinct primes an injective function on integers?

7 votes
Accepted

Proof of the theorem

7 votes

Is there a prime $p$ whose successor is greater than $2p$?

7 votes
Accepted

$\textbf Z[\sqrt{pq}]$ is not a UFD if $\left( \frac{q}p \right) = -1$ and $p \equiv 1 \pmod 4$.

7 votes

Prove that there are infinitely many integers n such that $4n^2+1$ is divisible by both $13$ and $5$

6 votes

Primes on the form $p^2-1$

6 votes
Accepted

Is $1+\sqrt{5}$ a prime under the $\mathbb{Z}[{\sqrt{5}}]$ domain?

6 votes

Is the number $-1$ prime?

6 votes

Prove, axiomatically that $1$ does not equal $0$.

6 votes

Why is the Fundamental Theorem of Arithmetic so important?

6 votes
Accepted

Finding units in quadratic integer rings

6 votes
Accepted

Properties of The Number 137

5 votes

Prove there are infinitely many primes equivalent to $5 \pmod 6$.

5 votes
Accepted

prime and irreducible elements $\equiv 1$ modulo $4$

5 votes
Accepted

When all of $n-2$, $n+2$, $n^2-2$, and $n^2+2$ are primes?

5 votes

Smallest positive integer that gives remainder 5 when divided by 6, remainder 2 when divided by 11, and remainder 31 when divided by 35?

5 votes

What are better approximations to $\pi$ as algebraic though irrational number?

5 votes

Why is $x^2+1$ not divisible by 3?

5 votes

group of units of $\mathbb Z\left[\frac{1+\sqrt{5}}{2}\right]$

5 votes

Do units in $\mathbb{Z} [(1+\sqrt{d})/2] $ have norm $\pm1$?

5 votes

Factoring 2 in $\mathbb{Q}(\sqrt{-7})$

5 votes

Show that for $n!/2 - p$, $p$ is the least prime factor if $n > p$

5 votes

Why multiplying powers of prime factors of a number yields number of total divisors?

5 votes

How to get polynomial of algebraic number that is not algebraic integer

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