Skip to main content
Search type Search syntax
Tags [tag]
Exact "words here"
Author user:1234
user:me (yours)
Score score:3 (3+)
score:0 (none)
Answers answers:3 (3+)
answers:0 (none)
isaccepted:yes
hasaccepted:no
inquestion:1234
Views views:250
Code code:"if (foo != bar)"
Sections title:apples
body:"apples oranges"
URL url:"*.example.com"
Saves in:saves
Status closed:yes
duplicate:no
migrated:no
wiki:no
Types is:question
is:answer
Exclude -[tag]
-apples
For more details on advanced search visit our help page
Results tagged with
Search options answers only not deleted user 145210

For questions about the CAPTCHA used on Stack Exchange sites to verify that you're a person and not a spam-bot.

69 votes

Captcha on AREA 51 is too hard for a human to solve

That's just (Φ,d)∈(X*\{0})×R, what's so difficult to enter? (Seriously, you could just refresh to get a new one if you can't solve it.)
kennytm's user avatar
  • 9,223
18 votes

Impossible Captcha with non-keyboard characters

&phi;<sub>M,P</sub>(x) φM,P(x) (or use LaTeX \phi_{M,P}(x).)
kennytm's user avatar
  • 9,223