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5h
revised Show that $\left( \frac{q}{p} \right) \equiv q^{(p-1) / 2} \mod p$, where $\left( \frac{q}{p} \right)$ is the Legendre Symbol
edited body
5h
comment Show that $\left( \frac{q}{p} \right) \equiv q^{(p-1) / 2} \mod p$, where $\left( \frac{q}{p} \right)$ is the Legendre Symbol
I just had a thought, here, we (or you) prove that it is either $\pm 1 \mod p$, but the symbol isn't supposed to show that. An element can be a quadratic reisudue and be $-1 \mod p$ and it can not be a quadratic residue and be $-1 \mod p$, so how does this show that's what the symbol is?
6h
revised Identify all $a \mod 35$ such that $35$ is a pseudoprime to base $a$
added 8 characters in body
6h
revised Identify all $a \mod 35$ such that $35$ is a pseudoprime to base $a$
edited body
8h
comment Shortcut in calculating examples of elements of a given order?
So, to put it in other words, I first find the primitive element, $g$. Then, lets say I want an element of order $10$, I do $30/10 = 3$, and so I find $k$ such that $\gcd(k,g) = 1$ and $\gcd(k,30) = 3$ and then just do $g^3$?
9h
asked Shortcut in calculating examples of elements of a given order?
10h
comment Show that $\left( \frac{q}{p} \right) \equiv q^{(p-1) / 2} \mod p$, where $\left( \frac{q}{p} \right)$ is the Legendre Symbol
Oh, I meant I did it in this question when I used Fermat to show that $a^2 \equiv (blah)$, can that bit not be used again?
10h
comment Show that $\left( \frac{q}{p} \right) \equiv q^{(p-1) / 2} \mod p$, where $\left( \frac{q}{p} \right)$ is the Legendre Symbol
Whats $e$? Just some random integer that gives us $b \mod p$?
10h
comment Show that $\left( \frac{q}{p} \right) \equiv q^{(p-1) / 2} \mod p$, where $\left( \frac{q}{p} \right)$ is the Legendre Symbol
I've already shown that $x^2 \equiv 1 \mod p$ so I can then just say from here we can see that $x \equiv \pm 1 \mod p$?
10h
comment Show that $\left( \frac{q}{p} \right) \equiv q^{(p-1) / 2} \mod p$, where $\left( \frac{q}{p} \right)$ is the Legendre Symbol
@JyrkiLahtonen Yeah, its that group. What's the difference?
10h
revised Show that $\left( \frac{q}{p} \right) \equiv q^{(p-1) / 2} \mod p$, where $\left( \frac{q}{p} \right)$ is the Legendre Symbol
added 15 characters in body
10h
accepted Identify all $a \mod 35$ such that $35$ is a pseudoprime to base $a$
10h
asked Show that $\left( \frac{q}{p} \right) \equiv q^{(p-1) / 2} \mod p$, where $\left( \frac{q}{p} \right)$ is the Legendre Symbol
11h
accepted Find what values of $n$ give $\varphi(n) = 10$
11h
comment Identify all $a \mod 35$ such that $35$ is a pseudoprime to base $a$
You mean it must divide $\varphi(7) = 6$, not $\varphi(6)$
23h
comment Identify all $a \mod 35$ such that $35$ is a pseudoprime to base $a$
@AndréNicolas Oh, so once I have these conditions, I still have to solve them for $x$? I.e chinese remainder theorem (unless it's easy to spot). Also, was my $\gcd$ "cheat" correct?
1d
asked Identify all $a \mod 35$ such that $35$ is a pseudoprime to base $a$
1d
comment Find what values of $n$ give $\varphi(n) = 10$
@TobiasKildetoft You mean using fundamental theorem of arithmetic? Also, can I keep editing the question with what I'm doing so you can see if I'm making mistakes anywhere?
1d
asked Find what values of $n$ give $\varphi(n) = 10$
1d
comment If $17 \mid \frac{n^m - 1}{n-1}$ find the values of $n$ where $m$ is even but not divisible by $4$
Think you misread it slightly lol, I need the $n$ values, not the $m$ ones. Unless that was a typo on your part?