What Are the Limits of the Human Memory?
15 Dec 2025 · 6 min
Podcast episode hosted by JJ Virgin that mixes sponsor/read ad segments with a listener Q&A about human memory. The central informational segment features Jonathan Levy (accelerated learning and memory expert) discussing theoretical and empirical limits of human memory — mentioning a proposed neuroscience estimate (~2.2 petabytes) and multiple world-record memory feats (e.g., 547 digits in one second, 1,170 binary digits in five minutes, 187 names/faces in 15 minutes, a deck of cards <14s, 130 random words in five minutes). The episode also includes lifestyle sponsor plugs (Earth Breeze, Wayfair, Monarch) and other brief promotional reads.
Questions this episode answers
About 2.2 petabytes.
12 petabytes.
547 digits in one second.
1,170 binary digits in five minutes.
187 names and faces in 15 minutes.
Chapters
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What are the Limits of the Human Memory? This is JJ Virgin, four time New York Times bestselling author, celebrity nutrition expert and Fitness hall of Famer. I've been on a lifelong quest for answers to the toughest health questions and now I'm sharing what I found with you. Welcome to Ask the Health expert. Sierra from YouTube asks, what are the limits of the human memory? Hey, it's JJ and I've asked author, podcast host and keynote speaker Jonathan Levy, who's an expert in accelerated learning and memory, to answer this question. Stay tuned.
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This is such a great question, and I love this question because it really opens up people's imagination as to what is possible and just what they can do. Because I want to preface by saying that anyone and everyone can do these incredible feats of memory. So there is a theoretical limit of what the human brain can memorize. And I've heard it say I've heard neuroscientists say that it's about 2.2 petabytes. To put that into perspective, when the NSA leak happened, all those different leaks with Edward Snowden, the total amount of Data that the NSA had collected on all of humanity was 12 petabytes. But I often tell people that's not really relevant because how do you measure and what is the storage space of a single memory? So what I like to tell people and share with people is what are the world records? What have the everyday people who've trained for years and years been able to do? We know that someone can in one second memorize 547 digits. We've seen people who can memorize binary digits up to 1,170 digits in five minutes. There is a record right now for 187 names and faces in 15 minutes, a deck of cards in under 14 seconds, and 130 random words in just five minutes. So the short answer is we don't really know. And every year those limits get pushed back more and more and more. What it ultimately comes down to is are you using your memory in the right way? Are you trained to use your memory in the same way that an athlete is trained to use their body?
This is JJ with Ask the Health Expert. I do this five times a week, so make sure you never miss a show by going to subscribetoj.com.
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