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Posted by fuzzythinker 1 day ago

Engineering Memory: On learning to memorize first 100 digits of pi (2024)(gregorygundersen.com)
54 points | 34 commentspage 2
dominicrose 10 hours ago|
Learning an entire Mozart sonata is probably easier. How much engineering there is in the memorizing or in the composition I don't know, a lot?
seanhunter 9 hours ago|
A lot of professional musicians memorize tons of music habitually. It's not very hard to be completely honest.

Mozart only wrote like 20 piano sonatas and about the same number of violin sonatas. It's no exaggeration to say that most concert pianists or violinists probably know at least 5 of them just as a matter of course because they will have learned them at some point in their musical education and someone who specialised in the classical period would probably know all of them. My wife learns tons of repertoire when she's performing as most of her concerts are completely from memory and this includes a vast range of repertoire from the middle ages through very complex 20th/21st century music.

Conductors often memorize monumental works as part of their preparation. Eg Zubin Mehta conducting Bruckner's 8th from memory age 89. That's a way way bigger piece of music than a Mozart sonata - super long and with massive forces. https://parsikhabar.net/music/zubin-mehta-at-89-still-comman...

This is the same as how chess grandmasters know literally hundreds or possibly thousands of games. Extreme example: David Howell tests Magnus Carlsen https://youtu.be/eC1BAcOzHyY?si=I-xJEo4NQUkLPDQ0

...or jazz musicians know hundreds or possibly thousands of standards.

You kind of have to know these things to perform. That being said with memorizing music you have a lot of structure that makes it easier whereas memorizing digits of pi or e you are learning a transcendental number so it may as well be random. You have to impose whatever structure you can, which must surely make it harder.

neitsa 4 hours ago||
This reminds me of this video [0] of Maria João Pires, who realized that she had prepared the wrong concerto while on stage, being visibly shocked and panicked (and the conductor telling her that there would be no problems as she knows the piece very well). She apparently played the piece perfectly.

[0] https://www.youtube.com/watch?v=300t2DS3VdQ

_fw 8 hours ago||
I used a memory palace for my A-Level Law exams. I was able to remember names and details for up to 250 different cases very easily, in fact so easily it felt like cheating.

The trick is to embrace incredulity. The more bizarre and strange the “tags” you assign to what you remember, the easier they stick in your head. It feels daft and cringeworthy, but it really, really works.

For this, however, I’d argue a memory palace is overkill. And I still don’t know how well it lends itself to remembering numbers by rote.

Consider this: how many telephone numbers have you memorised?

I can recall four of my own, each of my parents, my wife, and a handful of home phone numbers too.

That’s easily 100 digits in a specific order. Perhaps it’s possible to chunk the 100 digits of pie into smaller pieces, and memorise them like phrases, just as we do with phone numbers.

ThrowawayTestr 2 hours ago||
I memorized up to like 30 by singing the pi song over and over
xpct 8 hours ago||
I never found a real life use case for memory tricks. Would be curious to hear if someone has.
Betelbuddy 5 hours ago||
I will give you an encrypted message, from which you will be the transport medium, and will bring it across the border. No signals to flag alarm ...and you also wont know what it means...
esafak 5 hours ago||
I did that just lass week, but they headed me off at the pass before I could reach the dead letter box!
abbefaria27 27 minutes ago||
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cryptoz 10 hours ago||
In 1999 when I was about 12, I memorized 120 digits of pi with little issue. I had some extra motivation: once I got to 20-30 digits, a classmate bet me I couldn't get past 100, and he'd give me $1 for every digit I memorized past 100. Never saw my $20 :(. Pretty sure it was a well-executed nerd-snipe.

Having not practiced at all since about 2001 or so, I can still get to about 30 pretty easily. I didn't use any techniques specifically, I just kept practicing as far as I remember.

fellowniusmonk 3 hours ago||
Do all of these "provocative" visual imagery mappings work for those with aphantasia? Any anecdotal evidence or otherwise for that? Seems unlikely.
HackerThemAll 6 hours ago||
NASA requires 15 decimals of pi for interplanetary navigation. On the range of 16 bn miles to Voyager 1 it gives them calculations being off by 0.6 inch. For universe-sized circles they need 37 decimals of pi.

Trying to remember 100 digits of pi won't give you any advantage in cognitive functions apart from memorizing 100 digits of pi, for a little while. Better spend your time elsewhere.

https://www.jpl.nasa.gov/edu/news/how-many-decimals-of-pi-do...

criddell 4 hours ago|
You think they are memorizing the digits of pi because it’s useful?
oliculipolicula 16 hours ago|
If Socrates were alive today, he'd encourage engineers to internalise the spigot algorithm

Then, like a MENTAT, they'd be able to tell you the 16afedf97fd4th digit of pi when prod

In hex, naturally https://en.wikipedia.org/wiki/Bailey%E2%80%93Borwein%E2%80%9...

>The BBP formula gives rise to a spigot algorithm for computing the nth base-16 (hexadecimal) digit of π (and therefore also the 4nth binary digit of π) WITHOUT computing the preceding digits.

Ey7NFZ3P0nzAe 10 hours ago||
I have a huge respect for Fabrice Bellard for creating his own optimized version:

https://en.wikipedia.org/wiki/Bellard's_formula

mathgeek 5 hours ago||
Reminds me of the old adage that if a famous person from the ancient world were alive today, they'd either be very, very old -- or not famous.