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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 - Binary Numbers - 30 Minutes - Current world record 1. At the 2007 Memory World Championships in Manama, Bahrain, Ben Pridmore (UK) remembered 4,140 random binary digits in 30 minutes.   Previous verified claims 1. At the 2003 German Memory Championships, Dr. Gunther Karsten remembered 3,180 random binary numbers beating his own previous world record of 2,970.     The Book of Alternative records - World records, record breakers and more!