Tyler Furman created a 557-character hashtag on Twitter.

The hashtag in its entirety reads:

#ⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷⅷ

Cameron Shurtz posted a single-character tweet on Twitter.

On March 13, 2010, during the The Bigg Digg Shindigg held as part of the South By Southwest Interactivefestival, Brian Brushwood, Justin Robert Young and Brett Rounsaville asked the crowd to participate in the world’s largest Twitter hoax.

The idea of the hoax was to trick people into thinking Conan O’Brien had joined Internet television company Revision 3.

525 tweets containing the hashtag ‘#omgconan’ were sent in next three hours, making it a Trending Topic on Twitter.RecordSetter president Dan Rollman was present as a witness.

The count of 525 was taken using Twitter’s Advanced Search, tracking the hashtag #omgconan between 9 and 12 PM CST.

1000’s of other tweets related to the hoax followed, but they were not included in the final count.

Read a CNET news story on the hoax here.

#ATXDiggnation01

Collectively using the hashtag “#quackurdb” to track it, a community of users on Twitter sent 869 tweets that included the word “quack” in one hour. The record was created by a group ofNSFWshowfans known as ‘chatrealm.’

As part of a LIVESTRONG Young Adult Alliance project, the hashtag [#BreakCancer][] was tweeted 681 times during a 24-hour period.

The count of 681 was taken using Twitter’s Advanced Search, tracking the hashtag #BreakCancer between 8:36 pm on November 11, 2010 and 8:36 pm on November 12, 2010.

Using his @mosescashmonies account, Adam Basher sent 110 consecutive tweets with the hashtag #WorldRecordMostTweets.