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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 - Decimal numbers - 1 second - Current world record 1. 19 Ramón Campayo (Spain) on 6 November 2005 in Dachau (Germany)   Previous verified claims 1. 18 Ramón Campayo (Spain) on 7 November 2004 in Starnberg 2. 17 Ramón Campayo (Spain) on 4 September 2004 in Moscow     The Book of Alternative records - World records, record breakers and more!