American cancer survivor Sarah Thomas set the record.
This was after crossing the English Channel four times incessantly.
Thomas, an open water marathon swimmer from Colorado, finished the record in 54 hours.
It originates in the Dover port in Britain and ends at Shakespeare Beach on the south coast of the United Kingdom.
The 37-year-old swimmer further revealed that he was tired but he was reluctant to offer the record to his fellow breast cancer survivors.
He spent two years preparing such a swim.
Some famous swimmers around the world praised Thomas for doing this.