Ugh. It truncated the 19xx from my birth year. I was initially pleasantly surprised to get a 6 digit result for an 8 digit input... but alas I'm not special, in terms of pi birthday compression ratio ;)<p>Edit:<p>- "enter date in any format"<p>- Okay, interesting... I enter day-year-month<p>- "there's something wrong with the date you entered!"<p>Lol
I entered a few dates in YYYY-MM-DD format and it seems like it does whatever it wants with them?<p>Some results are without the first 2 year digits.<p>Some results are plain bogus, a 2012-03-XX date returned a 2012-10 number (without the day component and wrong month).<p>If this is an ad for the power of Wolfram Alpha it is very poorly executed.
A friend of mine once made the argument to me that software patents are nonsense because if pi is normal[0], then your source code, suitably encoded, appears somewhere in pi.<p>I don't know that that's a good argument, but it's a fun one.<p>[0] and while we don't know for sure signs point to yes
Not as pretty but you can search for longer sequences in Pi here <a href="https://www.angio.net/pi/" rel="nofollow noreferrer">https://www.angio.net/pi/</a>
Interesting that it formats the results differently based on the input. For example, "June 12 1980" results in "6 12 80", while "1980-06-12" returns "80 06 12". I was kind of hoping to find the "YYYYMMDD" value regardless of input, but ah well.<p>The link in sibling comment by brynbryn [0] is a much better (not to mention faster) implementation IMO.<p>0: <a href="https://news.ycombinator.com/item?id=37955434">https://news.ycombinator.com/item?id=37955434</a>
Pi makes finding particular digit patterns somewhat hard. A number in which any digit pattern can be more easily found is Champernowne's constant [1]<p><pre><code> C10 = 0. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ...
</code></pre>
([0..]>>=show in Haskell) which is provably normal in base 10 (for pi it's widely believed but unproven).<p>Of course the minimal index i(w) at which digit sequence w appears is about as long as w itself...<p>[1] <a href="https://en.wikipedia.org/wiki/Champernowne_constant" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/Champernowne_constant</a>
Back in my youth I wanted a tattoo of different numbers swirling around my right arm and over my shoulder onto my back. Pi would have been the backbone of the tattoo.<p>In the different numbers would have been my birth-minute represented in decimal unix time, hex, binary, etc. Then different date systems from around the world, Islamic, Hebrew, Devanagari, Chinese Lunar, Japanese, and Mayan long count. I gave up because I couldn't find enough people that I trusted to verify that the different language date strings were correct.
For people who's first/last name letters fall within a band of ten consequitive letters of the alphabet (any alphabet, despite its origins Pi is surely multi-lingual), one can use the same algorithm to find themselves somewhere in Pi.<p>For the rest of us it is a bit trickier but should still work: use two consequtive digits (00-99) and a modulo function that loops over an alphabet (and possibly discards some padded values as not having a map to a letter).
You can probably find <i>any data</i> in pi, not just your birthday:<p>πfs – A data-free filesystem (github.com/philipl)<p>155 points by zapdrive 4 months ago | 108 comments<p><a href="https://news.ycombinator.com/item?id=36357466">https://news.ycombinator.com/item?id=36357466</a>
dont give a rando website your correct birthdate. not for something as silly as this. dont give any of your "banking PII set" data to strangers online, folks. sheesh. shameful made front page of HN. wow<p>consider this a phishing op until proven otherwise
Another implementation of the same idea that's ~25 years old: <a href="http://www.facade.com/legacy/amiinpi/" rel="nofollow noreferrer">http://www.facade.com/legacy/amiinpi/</a>
Imagine a compression that is just a counter aka pointer + size, pointing to pi. If you want to trade computation, you could even add recursive hop pointering. As in the place this points is pointer to the next location with size.
So, someone born on 01-01-50 has the lowest possible number at position 2,562, followed by 01-01-65 at 9,985 and 01-01-78 at 30,081.<p>If you use full dates, the lowest is 01-01-1978 at 109,223.<p>Starting with year first, the lowest is 1-12-12 at 79.
This feels like a phishing ploy to me. Isn't anyone else hesitant to provide their personal data to such sites? It's like something one would see on Facebook.
9/17/90<p>The string 91790 occurs at position 66638. The string 66638 occurs at position 29666.<p>I'm two levels deep, and the reoccurrence of 666 has me worried.
<a href="https://www.wolfram.com/legal/privacy/wolfram/" rel="nofollow noreferrer">https://www.wolfram.com/legal/privacy/wolfram/</a><p>> We may collect both Personal Information (PI) and non-Personal Information (non-PI) about you through your experience on our websites, from your use of our services and products and via other voluntary contact with you (collectively "Services").<p>> The PI we collect through our Services primarily consists of information you submit to us. Because participation in our Services is voluntary, you have a choice of whether or not to disclose such information. The following are categories of PI we have collected in the past 12 months:<p>> Identifiers<p>> Examples include: a real name, alias, postal address, unique personal identifier, online identifier, Internet Protocol address, email address, account name, Social Security number, driver's license number, passport number or other similar identifiers<p>Now add birth date to the list.