so-called friend Don's user avatar
so-called friend Don's user avatar
so-called friend Don's user avatar
so-called friend Don
  • Member for 12 years, 8 months
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8 votes
Accepted

Approximate primitive roots mod p

8 votes
Accepted

Powers modulo a fixed integer

7 votes
Accepted

Representing primes explicitly with binary quadratic forms

7 votes
Accepted

The number of distinct prime factors of $n\in\mathbb N$

7 votes
Accepted

If $N = {q^k}{n^2}$ is an odd perfect number given in Eulerian form, is $n$ squarefree?

7 votes

On the natural density of almost perfect numbers

7 votes
Accepted

On the number of consecutive divisors of an integer

7 votes

Lower bounding the probability that $\gcd(t,N)≤B$, for a random $t$ and fixed (large) $N$

7 votes

Average class number formula for imaginary quadratic fields with prime discriminant

7 votes
Accepted

Lower bound on Carmichael Function

7 votes

Numbers that don't start with (p-1) in base p for any p

7 votes

Squares of the form $2^j\cdot 3^k+1$

6 votes
Accepted

Additive basis of a set union the square of the set

6 votes
Accepted

multiplicative functions of powers

6 votes
Accepted

Did Erdős prove there are two primes $4a+1, 4b+3$ between between $n$ and $2n$?

6 votes

What Dirichlet doesn't tell...

6 votes

Generalization of Euler four square formula?

6 votes

A generalized Möbius function?

5 votes

Are There Infinitly Many $n$ Which $a\times n!+1$ Be Composite?

5 votes

The implicit constant in GRH

5 votes
Accepted

What proportion of the positive integers satisfy $I(n) < \frac{2n}{n + 1} \leq I(n^2) < 2$?

5 votes

A simultaneous generalization of the Grunwald-Wang and Dirichlet Theorems on primes

4 votes

Is $\limsup_{x\to\infty}\big(\sum\limits_{d|3^x-1}{1/d}\big)/\big(\sum\limits_{p<x}1/p\big)<\infty$?

4 votes
Accepted

A very slowly diverging series

4 votes

A family Mersenne composite numbers?

3 votes
Accepted

Are all known $k$-multiperfect numbers (for $k > 2$) not squarefree?

3 votes

Lower bound for Euler's totient for almost all integers

3 votes
Accepted

A question related to Hilbert's Irreducibility Theorem

2 votes

Greatest common divisor of a^{2^n}-1 and b^{2^n}-1

2 votes

How are these number-theoretical constants actually distributed?