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Graham's Number - Numberphile

30 videos recommended on HN
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4 HN users recommended this explainer3 months2013–2024 score 4
Years with an HN recommendation, 2007–2026

Recommended as the mind-melting intro to unimaginably large numbers.

Numberphile's Tony Padilla and Matt Parker discuss Graham's number, once the largest number used in a mathematical proof, and how enormous it is.

“It's a pretty interesting video for seeing how quickly the numbers get unimaginably massive.” (HN, 2019)

2 strong recommendations · 2 recommendations · 2 citations · Explainers

6 Hacker News comments

From the HN archive; up to 20 kept per video, favoring different commenters. Recommendations first.

@prezjordan Feb 2015 Strongly recommends
on HN thread Graham's Number
My brain melts every time I watch this video [1] from Numberphile on Graham's number. They also had another video [2] with Ron Graham himself :) [1]: [this video] [2]: [link]
Mind-melting Numberphile video on Graham's number.
@jiggawatts May 2024 Strongly recommends
on HN thread A Trial HIV Vaccine Triggered Elusive and Essential Antibodies in Humans
Read more
If math can make you feel awe, you've got to watch the Numberphile series on very big numbers. They're constants used in proofs that are specific, well-defined integers known to be finite, but so huge that the physical universe does not have enough particles (or even Plank-scale microstates) in it to represent the number of digits these numbers have! Absolutely mind-bending stuff. Listed in increasing order: "Graham's Number" [this video] "How Big is Graham's Number? (feat Ron Graham)" [link] "The Enormous TREE(3)" [link] "TREE(3) (extra footage)" [link] "The Daddy of Big Numbers (Rayo's Number)" [link]
Numberphile series on huge numbers used in proofs, mind-bending.
@Ronsenshi Feb 2015 Recommends
on HN thread Graham's Number
I love this video [link] by Sean Day[9] Plott describing Graham's number very well. At least I found that description very easy to follow. Numberphile [1] too has a great explanation, but I still strongly recommend watching Day[9] video because it tells a little bit of history and Sean is very expressive and good speaker so he easily engages viewer. [1] [this video]
Numberphile gives a great explanation of Graham's number.
@johnsonjo May 2019 Recommends
on HN thread Knuth's Up-Arrow Notation
I've seen this notation in a video [1] on Graham's number [2] by Numberphile. It's a pretty interesting video for seeing how quickly the numbers get unimaginably massive. [1]: [this video] [2]: [link]
Shows how quickly numbers become unimaginably massive.

Citations, criticism and jokes

@Balgair Nov 2017 Cites it
on HN thread Ray Kurzweil thinks we could start living forever by 2029
10E65 if protons do decay. 10E(10E76) if protons do not decay and virtual black-holes do not exist. At about 10E(10E(10E56)) the universe should spontaneously create a new universe, so that that is the most upper limit of time in our universe. Fairly small actually, compared to things like Graham's number and Tree(3). Turns out, infinity is really big. [link] [this video]

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