Mathematics
Robert Soupe
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451 Answers

Newest Activity Votes
27
What is Trinity Hall Prime number?
Sep 7 '17 at 19:48
11
How does passing to ideals solve the problem of unique factorization?
Apr 8 '18 at 18:09
10
What are some other ways to compute the factorials using addition only?
Jul 2 '17 at 0:52
10
Describe the multiples of $21$ that ends with $241$
Nov 26 '17 at 1:08
9
Is the sum of two distinct primes an injective function on integers?
May 4 '18 at 2:42
9
Ring of algebraic integers as lattice points in the complex plane
Jul 10 '16 at 18:47
9
Suppose that both $p$ and $p^2 +2$ are prime numbers. Show that $p=3$.
Apr 3 '15 at 3:15
8
$x^2 - (x - 1)$ is prime?
Feb 26 '18 at 3:58
8
What is the Euclidean function for $\mathbb{Z}[\sqrt{14}]$?
Feb 21 '17 at 17:34
8
What is the Euclidean function for $\mathbb{Z}[\sqrt{14}]$?
Feb 19 '17 at 21:40
8
Why does the symbol for the multiplication operation change shape?
Jun 30 '16 at 5:17
8
So what *is* the Euclidean function for $\mathcal{O}_{\mathbb{Q}(\sqrt{69})}$?
Jan 11 '15 at 2:34
7
Is there a prime $p$ whose successor is greater than $2p$?
Aug 29 '17 at 20:00
7
$\textbf Z[\sqrt{pq}]$ is not a UFD if $\left( \frac{q}p \right) = -1$ and $p \equiv 1 \pmod 4$.
Jul 22 '17 at 19:47
7
Do we have negative prime numbers?
Jul 13 '17 at 18:14
7
Is $\mathbb{Z}[\sqrt{15}]$ a UFD?
Feb 11 '16 at 4:08
7
Prove that $\sum^{n-1}_{i=1}i^{(n-1)} \equiv -1$ (mod $n$) for all prime $n\in\mathbb{N}$.
Jul 17 '16 at 3:30
7
Suppose $p, p+2, p+4$ are prime numbers. Prove that $p = 3$ not using division algorithm.
Aug 31 '15 at 1:42
6
When are quadratic rings of integers unique factorization domains?
Nov 29 '18 at 5:29
6
Is there a method that can allow us to know how to prove theorems (number theory)?
Mar 8 '19 at 5:59
6
Confused about the splitting of 2 in $\mathbb{Q}(i).$
Feb 28 '19 at 6:04
6
Why is 1 not a prime number?
Nov 15 '14 at 7:36
6
GCD in arbitrary domain
Oct 16 '18 at 1:29
6
Irrationality of $\sqrt{2m}$
Jun 1 '18 at 1:43
6
Factoring rational primes over the Eisenstein integers - when can a prime be written as $j^2+3k^2$?
Feb 24 '18 at 20:09
6
Are there infinite many positive integers $n$ such that $n^2+n+41$ is composite, but not divisible by $41$?
Feb 4 '18 at 21:11
6
Why doesn’t this logic work? (Where did I go wrong?)
Oct 18 '17 at 16:16
6
Is 2014411 Prime?
Oct 3 '17 at 4:39
6
Is this a regularity in primes?
Sep 27 '17 at 16:56
6
There are infinitely many prime numbers $p$ for which $p + 2$ and $p + 4$ are also prime numbers
Sep 23 '17 at 20:01
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