Happy "Pythagorean Triple Square Day" 9/16/25

[Steve Weyer]

https://www.npr.org/2025/09/16/nx-s1-5535545/pythagorean-triple-square-day-9-16-25

[Priscilla Oppenheimer]

Cool! 📐

When will the next one be? Or maybe this is the last one! The numbers get too big to be months after this.

Sent from my iPad

On Sep 16, 2025, at 5:05 AM, Steve Weyer <saw...@gmail.com> wrote:

https://www.npr.org/2025/09/16/nx-s1-5535545/pythagorean-triple-square-day-9-16-25

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[Priscilla Oppenheimer]

To answer my own question about the next one, Wikipedia says: 

There are 16 primitive Pythagorean triples of numbers up to 100:

(3, 4, 5) (5, 12, 13) (8, 15, 17) (7, 24, 25)

(20, 21, 29) (12, 35, 37) (9, 40, 41) (28, 45, 53)

(11, 60, 61) (16, 63, 65) (33, 56, 65) (48, 55, 73)

(13, 84, 85) (36, 77, 85) (39, 80, 89) (65, 72, 97)

Other small Pythagorean triples such as (6, 8, 10) are not listed because they are not primitive; for instance (6, 8, 10) is a multiple of (3, 4, 5).

So I guess 3,4,5 are the only ones that work for dates. So the next one is 9/16/2125. I guess we won't be around for it, alas. Maybe your kids or grandkids will see it!

3,4,5 is special also, of course, because it's consecutive numbers. Yeah!

Priscilla

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[Bill Saltzstein]

Happy centennial Pythagorean day!

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Bill Saltzstein

425-442-5854

On Sep 16, 2025, at 10:35 AM, 'Priscilla Oppenheimer' via Ashland Undesirables <ashland-un...@googlegroups.com> wrote:

To view this discussion visit https://groups.google.com/d/msgid/ashland-undesirables/A74A22C2-B4A2-4305-ABFE-1C2E01C0389B%40priscilla.com.