Read on Twitter
This is an integer 
UNBELIEVABLE!
UNBELIEVABLE!
proof's for rial
wait, what's that speck beside the root symbol?
no one has noted that “proof's rial” is an anagram for “april foo's”
(i know it's a lame anagram but there were clues people)
(i know it's a lame anagram but there were clues people)
By the way, it's a 45-year-old joke that (I think) first appeared in Martin Gardner's Mathematical Games column in the Scientific American. "Six sensational discoveries that somehow or another have escaped public attention", April 1975.
You can't say I didn't warn you.
There are probably a fair number of people who liked (maybe even retweeted) the tweet believing what it said based on its "popularity".
One thing I've learnt from this: If a statement as easily verifiable as "this number is an integer" can fool people on April Fool's Day(!), it's less of a surprise what goes on in much messier situations (e.g. politics).
Finally, I appreciate people replying with "it's not true" etc, trying to "make things right". But if you don't notice/acknowledge the fact that it's a harmless joke, then I'm afraid the joke is on you.
