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ordptt
  • Member for 3 years, 8 months
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13 votes
2 answers
309 views

Average period of the decimal expansion of reciprocals of prime numbers

11 votes
2 answers
298 views

Average number of days to see all possible cards

10 votes
1 answer
498 views

Does $\sum^{\infty}_{n=1}\left(\frac{p_{n+1}}{p_n}-1\right)^2 $ converge?

6 votes
2 answers
923 views

Average number of steps in the Collatz conjecture

5 votes
1 answer
327 views

Deriving a better approximation for the sum of steps in the Collatz conjecture

5 votes
3 answers
545 views

Finding Integer Approximations

4 votes
2 answers
152 views

Prove $10^{P(n)/2}+1$ is divisible by $n$

4 votes
1 answer
144 views

Deriving $\gamma \approx H(n)-\ln(n+1)+\frac{1}{2(n+1)}+\frac{1}{12(n+1)^2}$

4 votes
3 answers
196 views

Solving differential equation for density in a gas sphere

4 votes
0 answers
69 views

Approximating a number with $a^b$ or $\sqrt[b]{a}$ for $a,b \in \mathbb{N}$

4 votes
1 answer
196 views

Proving $a(n)$ is not prime for all $n\ge 8$ [closed]

3 votes
0 answers
97 views

Proving an integral doesn't converge

2 votes
2 answers
389 views

Linearization before curve fitting

2 votes
1 answer
49 views

Prove that $\left( \frac{x+1}{k} \right)^x>x!$ for $k<e$

2 votes
3 answers
122 views

Solving an improper integral of a product

2 votes
1 answer
108 views

Calculation of generalized Artin's constants

1 vote
1 answer
167 views

Deriving a logarithmic solution for a functional equation

1 vote
0 answers
71 views

Pattern related to the exponents of the prime factorization of natural numbers

1 vote
1 answer
44 views

Proving that $\sum_{k=m}^{\infty}\prod_{t=0}^{n}\frac{1}{(k+t)}=\frac{1}{n}\prod_{t=0}^{n-1}\frac{1}{(m+t)}$

1 vote
0 answers
84 views

Calculating the subtended angle/arc length of a curve for $x>0$

1 vote
0 answers
50 views

Taylor series for $|y|^x(2-y)=1$?

1 vote
2 answers
52 views

How can I simplify $(n\,\mathrm{ mod }\,b^{k+1})\,\mathrm{ mod }\, b^k$? [duplicate]

1 vote
1 answer
63 views

Is there a way to solve $\arcsin\left(\frac{d}{r}\cdot \sin(x)\right)=\phi-x+\frac{\theta}{2}$ for $x$?

0 votes
2 answers
81 views

Prove that $n\left(n(n-3)+8\right)$ is divisible by 3 [duplicate]

0 votes
0 answers
64 views

Deriving an approximation for the Riemann zeta function

0 votes
2 answers
109 views

Maximum value of $-\sum_{i=1}^{n}p_i \log_2(p_i)$ for $\sum_{i=1}^{n}p_i=P<1$ [duplicate]