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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. Memory - Decimal digits - 30 minutes - Current world record 1. Simon Reinhard (Germany) memorised 1,400 decimal digits in 30 minutes at the German Memory Championships on 27 July 2012 in Heilbronn, Germany.   Previous verified claims 1. Johannes Mallow (Germany) memorised 1,284 decimal digits in 30 minutes at the German Memory Championships on 12 November 2010 in Heilbronn, Germany.     The Book of Alternative records - World records, record breakers and more!