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25.05.2026 New claim submitted for Backwards Stair Climbing, 1 Hour 09.05.2026 New claim submitted for Mental Calculation, Division 09.05.2026 New claim submitted for Mental Calculation, Square Roots Keywords: (e.g football beer mat)	Listed below are the verified claims for the record listed. Ultra speed memory - Binary numbers - 1 second - Current world record 1. 48 Ramón Campayo (Spain) on 25 July 2009 in Munich (Germany)   Previous verified claims 1. 42 Ramón Campayo (Spain) on 8 June 2006 in Pelhřimov (Czech Republic) 2. 40 Ramón Campayo (Spain) on 7 November 2004 in Starnberg 3. 33 Ramón Campayo (Spain) on 4 September 2004 in Moscow     The Book of Alternative records - World records, record breakers and more!