The Down Range Forum
Member Section => Down Range Cafe => Topic started by: Big Frank on March 14, 2024, 03:12:28 PM
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https://en.wikipedia.org/wiki/Pi_Day
Pi has been calculated to 31 trillion digits with supercomputers, but still keeps going. Here's the beginning of it.
3.141592653589793238462643383279502884197169399375105820974944592307816406286208998628034825342117067982148086513282306647093844
In junior high and high school we normally used 3.14 as an approximation, but other times used 3.14159. Or at least we had to know it. But nothing any longer than that. Anytime I want an approximation and have a cheap calculator available, I'll just divide 22 by 7. The scientific calculator on my computer comes up with 3.1428571428571428571428571428571, and the standard calculator says 3.142857142857143. Either one is way closer than I need to be on a measurement around the house or yard.
The 6 digits representing my birth day, month and year appear in Pi. I found my birthday here. If I make it out today, I plan on buying Pie to celebrate. Kroger has a bunch of pies, and even half pies, on sale for $1 off.
https://www.piday.org/find-birthday-in-pi/
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Given 31 Trillon digits everybodies birthdate should appear somewhere.
Of course if you only measure something to 4, 5, or 6 digits of accuracy then Pi calculated much beyond that isn’t significant
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You would think everyone's birthday appears in Pi somewhere, but there are some some simple sequences that don't show up, or not often. The number 123456 doesn’t appear anywhere in the first million digits of Pi. Using Find Birthday in Pi, I found 12-3-45 at position 49,703. It doesn't seem like it would take almost 50,000 digits for 12345 to show up but it did.
Rounding the number Pi to just 9 digits after the decimal point, and using it to calculate earth’s circumference yield incredibly accurate results. For every 25,000 miles, the number Pi will only err to 1/4 of an inch.
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Did someone say Pie??
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Interesting. There are multiple ways express a date; mmddyy, mmddyyyy, ddmmyy, ddmmyyyy. Or how about jjjyyyy? With the d/m/y which is the way that web site searches I'm around 42,500.
Of course measuring the Earth is fraught with issues. It's not a true sphere and the surface is of an irregular height, which changes over time. I think that for many uses sea level is used, though even that's not the same all the way around.
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For most of the world it was 14 March, or 14-3, not 3-14. When Americans talk about 9-11, a lot of people don't understand why it's not referred to as 11-9. If you're going by the Julian date instead of the Gregorian calendar, Pi Day was 24074 not 3-14-24. We used the Julian date exclusively on all our work orders when I was in the army. That was the only way you be sure to avoid confusing dates like 9-11 and 11-9. Maybe that was more important since I was in Europe over half of the time, but we always used it.
We should be using Tau, 6.18, instead of Pi anyway. It doesn't make any sense to use 2Pi, when you can use Tau instead and not have to do an extra step in calculations.
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There are 2 kinds of countries in this world... those that use day month/ metric system...and those that landed on thr moon
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Countries that measure calibers in mm, and countries than measure in decimal inches, like "God's caliber", .45 ACP.