The numbers

The 4×4 blindfolded, in numbers

Everything countable about the 4×4 blindfolded: the mathematics of the puzzle with its sources, and the live state of the sport, rebuilt nightly.

The puzzle is the 4×4 (7.4 × 10⁴⁵ positions Jaap's Puzzle Page), solved blindfolded after sighted memorisation.
The world record single is 51.96 by Stanley Chapel, standing 1,317 days.
The world record average is 59.39 by Stanley Chapel, standing 450 days.
19,388 completed solves are on the official record in 4×4 blindfolded, from 3,454 competitions in 83 countries.
2,174 people hold an official ranking. The median personal best among all of them is 8:49.06.
1 people have ever gone under 1:00.00 seconds.
The world record has moved 31 times since records began in 2003.
83 countries hold a national record, and the spread is wide: the fastest is 51.96, the most beatable 30:23.00.
65% of all official attempts in this event end in a DNF, against about 2% in regular 3×3. This is the sport's own measure of how hard blindfolded solving is.
Results begin in 2003; every figure on this page recomputes nightly from the official export.