for those who love to think
04-03-2017, 03:48 AM
Post: #1
 Don Shepherd Senior Member Posts: 749 Joined: Dec 2013
for those who love to think
What is the first multidigit palindromic prime to appear in the decimal expansion of Pi?

This number is also the sum of the first three 3-digit palindromic primes.
04-03-2017, 03:59 AM
Post: #2
 Paul Dale Senior Member Posts: 1,839 Joined: Dec 2013
RE: for those who love to think
It's within the digits of PI that I know

- Pauli
04-03-2017, 05:13 AM
Post: #3
 Joe Horn Senior Member Posts: 2,009 Joined: Dec 2013
RE: for those who love to think
3.141592653589793238462643383...

<0|ΙΈ|0>
-Joe-
04-03-2017, 08:09 AM
Post: #4
 Don Shepherd Senior Member Posts: 749 Joined: Dec 2013
RE: for those who love to think
@joe, you da man.

from the book
04-03-2017, 08:20 AM
Post: #5
 Paul Dale Senior Member Posts: 1,839 Joined: Dec 2013
RE: for those who love to think

I've memorised enough digits of PI to find the 383 without having to look more up.

- Pauli
04-03-2017, 11:52 AM
Post: #6
 Don Shepherd Senior Member Posts: 749 Joined: Dec 2013
RE: for those who love to think
(04-03-2017 08:20 AM)Paul Dale Wrote:

I've memorised enough digits of PI to find the 383 without having to look more up.

- Pauli

Ah, OK.

I'm afraid I've only mastered 3.14159. No rain man.

Don
04-03-2017, 10:23 PM
Post: #7
 Paul Dale Senior Member Posts: 1,839 Joined: Dec 2013
RE: for those who love to think
but I'd only just memorised enough....

Pauli
04-03-2017, 10:46 PM
Post: #8
 Dave Britten Senior Member Posts: 2,325 Joined: Dec 2013
RE: for those who love to think
I've only memorized the first 20, as that's usually way more than enough to overflow the precision of any calculating device I'm using that doesn't have Pi as a built-in constant.
04-04-2017, 08:28 PM
Post: #9
 Gerson W. Barbosa Senior Member Posts: 1,605 Joined: Dec 2013
RE: for those who love to think
I've memorized them all... in base $$\pi$$ :-)

10
04-05-2017, 12:15 PM
Post: #10
 toml_12953 Senior Member Posts: 2,156 Joined: Dec 2013
RE: for those who love to think
(04-03-2017 11:52 AM)Don Shepherd Wrote:
(04-03-2017 08:20 AM)Paul Dale Wrote:  I've memorised enough digits of PI to find the 383 without having to look more up.

- Pauli

Ah, OK.

I'm afraid I've only mastered 3.14159. No rain man.

Don

There was a story going around that some state legislator proposed a bill to define PI as the integer 3. He said it would make it easier for school children to learn. If the story true, I fear for our students!

Tom L

Tom L
Cui bono?
04-05-2017, 12:45 PM
Post: #11
 Bill (Smithville NJ) Senior Member Posts: 471 Joined: Dec 2013
RE: for those who love to think
(04-05-2017 12:15 PM)toml_12953 Wrote:  There was a story going around that some state legislator proposed a bill to define PI as the integer 3. He said it would make it easier for school children to learn. If the story true, I fear for our students!

Tom L

Do search for "Indiana PI Bill". This was in 1897 and did not pass.

Not one of Indiana's finest moments in legislative history, but, in retrospect, not much less crazy than some of the bills that are still being proposed today.

Bill
Smithville, NJ
 « Next Oldest | Next Newest »

User(s) browsing this thread: 1 Guest(s)