Happy Pi day to everyone.Wish a loong and meaningful life to everyone.I'll ask everyone to post any wonderful fact about pi here.I'm starting by giving a self-made series of computing value of $\pi$.

\[ \pi = \frac{102857 - 4480 \sqrt{108}}{17920} - 3 \sum_{n = 2}^{\infty}

\left( \frac{\prod_{k = n}^{2 n - 1} \left( 2 k + 1 \right)}{2^{7 n - 1}

n!} \left( \frac{1}{4 n + 1} + \frac{4 n + 1}{4 \left( 4 n + 2 \right)

\left( 4 n + 3 \right)} \right) \right) \]

## Happy Pi day

- Phlembac Adib Hasan
**Posts:**1016**Joined:**Tue Nov 22, 2011 7:49 pm**Location:**127.0.0.1-
**Contact:**

### Happy Pi day

Welcome to BdMO Online Forum. Check out Forum Guides & Rules

### Re: Happy Pi day

Haha nice! Same to you.

A wonderful fact about pi is that you can make infinitely many series like this!

A wonderful fact about pi is that you can make infinitely many series like this!

"Inspiration is needed in geometry, just as much as in poetry." -- Aleksandr Pushkin

Please

Please

**install LaTeX fonts**in your PC for better looking equations,**learn****how to write equations**, and**don't forget**to read Forum Guide and Rules.### Re: Happy Pi day

Happy birthday to Einstein as well.

One one thing is neutral in the universe, that is $0$.

- samiul_samin
**Posts:**999**Joined:**Sat Dec 09, 2017 1:32 pm

### Re: Happy Pi day

Happy $\pi$ day.

Also,This is the first day of Einstein

And The last day of Hawking.
We can get the number $1971$ very early @ $\pi$.

Also,This is the first day of Einstein

And The last day of Hawking.