England became the first team to score 500 runs on the opening day of a Test match Thursday, putting Pakistan to the sword in Rawalpindi. Four English batsmen scored centuries as the tourists cantered to 506-4 at the close of play. The previous record for runs on the first day was the 494 Australia accumulated against South Africa in Sydney in 1910.

from Times of India https://timesofindia.indiatimes.com/sports/cricket/news/england-break-112-year-old-record-score-506-runs-vs-pakistan-on-day-1-of-rawalpindi-test/articleshow/95915071.cms