Am I a human? Yes. Can I type phi off the top of my head? No. 
16 Answers
According to reCAPTCHA:
Each new word that cannot be read correctly by OCR is given to a user in conjunction with another word for which the answer is already known. The user is then asked to read both words. If they solve the one for which the answer is known, the system assumes their answer is correct for the new one.
So therefore if nobody else figured out this one, you would be the first and you could legitimately type anything and succeed at it.
answered May 5, 2010 at 17:44
-
9So that would explain why it let me through when I accidentally mistyped a captcha... Commented May 5, 2010 at 21:17
-
Yeah, the policy is harass some internet users to get your work done for free...– user148312Commented May 19, 2014 at 19:21
Pfft... that's easy. Try this one:
answered May 5, 2010 at 14:05
-
2
-
62
-
1@Jon: I don't think that █ is an 'ARABIC PLACE OF SAJDAH' (U+06E9)– kennytmCommented May 5, 2010 at 14:53
-
3
-
1Pretty easy on on iPhone
>++++++++++[>+++++++++++>+++++++++++>++++++++++++><<<<-]>>+>----><<<<>.>.>.– user146787Commented May 5, 2010 at 21:59 -
28
-
It looks kind of like a cake. Maybe it's "torte" reform.– user164291Commented Aug 8, 2012 at 20:53
As promised, here's the one I got a few days ago:
Edit: One more from just now (looks like they are scanning math books):
answered May 5, 2010 at 22:34
-
12
This is a trick question: you fail if you can type it.
The cat and mouse game continues...
Remember that, if the challenge is too "hard" to solve, you can request a new one with the "refresh" button.
-
1Klaatu ampliti ni*hack cough*!– user164291Commented Aug 8, 2012 at 20:54
You misunderstood - you are supposed to solve the equation as well.
I know it's tough but we have to keep the cyborgs out of Meta.
Readable, just confusing. It seems like reCAPTCHA is now digitising house numbers on Street View as well ;)
-
2Nice. And odd that they know where to find the number, but then still need a human to confirm its value ;-)– ArjanCommented Mar 28, 2012 at 5:47
-
5I've seen this recently. No else that I know agreed with me, about those being house numbers though. I am so happy that there is some else who believes that they are house numbers too!– Ellie KCommented Aug 8, 2012 at 20:24
-
-
Now, isn't at least one of these supposed to be a real word?
-
10Google: 'Your search - joutandt - did not match any documents'. lolz - what are the odds of 0 google hits on a single word consisting of ascii characters? Commented Aug 18, 2010 at 19:39
-
What's more impressive, we're discussing it on the Internet and it's still a Googlenope! (Also, I totally thought the second "word" was in Arabic at first.)– PopsCommented Sep 17, 2010 at 18:27
-
-
2No, "18 15 23 44" don't count as a word in my book, even if rotated by 90°.– MvGCommented Oct 5, 2012 at 19:56
-
@SkySanders Your comment is the top result, but nowadays there's also a Google Books results from something published in 1813...– IzkataCommented Aug 3, 2014 at 22:06
φ<sub>M,P</sub>(x)
φM,P(x)
(or use LaTeX \phi_{M,P}(x).)
-
φ doesn't work though :) it's clearly the capital letter Phi: ɸ. I am not sure of the HTML code for that though.– JoshuaCommented May 5, 2010 at 13:49
-
7@Joshua: The capital Greek Phi (
Φ) is Φ (U+03A6), not ɸ which is the Cyrillic Ef (U+0444). There's also a phi symbol ϕ (U+03D5) which may render like the image, depending on the font.– kennytmCommented May 5, 2010 at 13:54 -
4
-
19You know, providing LaTeX equations in captchas would be excellent for mathoverflow.com to keep out the riff-raff. They're always complaining that they get too many elementary-level questions there... ;)– EtherCommented May 5, 2010 at 14:49
First of all, I am human but no human being can decipher the ReCAPTCHA I just encountered.
-
24Someone skipped differential calculus.– user156620Commented Apr 23, 2011 at 8:45
-
-
-
-
1
-
6@TomWijsman: It's
\partial a_i/\partial a_{i-1}also pronounced "del", "dou", and other weird stuff. math.stackexchange.com/questions/110565/… Commented Mar 28, 2012 at 6:24 -
This is the best (or worst) CAPTCHA I've recieved.
-
4Oh, that's
\sum_(i=0)^n((-1)^n)/(2n-1^(\Delta^n))). Commented Feb 25, 2012 at 16:50 -
I just got one with an integral from -∞ to ∞. Is reCAPTCHA digitizing math books this week?
-
3It's been for some time. I recall an integral from a few weeks ago.– perbertCommented May 5, 2010 at 17:16
-
5Hmmm... I wonder if we're supposed to solve these?– Bill the Lizard ModCommented May 5, 2010 at 20:34
-
5@Bill: But there wasn't anything to integrate -- just the integral symbol. That's why it was so frustrating!– mmyers ModCommented May 5, 2010 at 21:40
I would have entered ompx.
You can also just press F5 to get another one.
-
6Is that popular demand? Don't think so.– user138231Commented May 5, 2010 at 14:24
I think it is the symbol of diameter. Well... I can: ∅ and ϕ
This are some details of phi:
UTF-8: 0xCF 0x95
UTF-16: 0x03D5
C-form (octal escaped UTF-8): \317\225
XML-form (decimal): ϕ
-
13
-
1@code poet: Yes. In linux there is a very handy app that allows you to access all symbols. Commented May 5, 2010 at 13:10
-
20
-
1@Quack Quixote: correct, the correct glyph is U+03D5 Greek Phi Symbol (referring to the posted image, it is the incorrect glyph). Windows also has a character lookup, called the Character Map.– JoshuaCommented May 5, 2010 at 13:38
-
-
Distorted text CAPTCHAs can be a little stressful also!
-
4
-
Must... Not... Type...– user474678Commented Aug 23, 2019 at 19:11
try { ReadCaptcha(); } Catch(InvalidCharacterException ex) { PostToMeta();RetrieveAnswerFromFoolishHumans();} Finally { SpamDeluge(); }><ϕᴍ,ᴘ(x)in plain text!