How to remember long numbers

Hardly anyone can hold more than seven or eight loose digits at once, but there are techniques that take you much further.

Group the digits in threes or fours, like a phone number.
Give the groups meaning: years, dates, ages or numbers you already know.
Repeat the number under your breath with a rhythm while you see it; rhythm helps retention.
Use images: link each group to a picture and chain them like a story.
Type it as soon as it disappears: every second of waiting weakens it.

Try combining grouping with rhythm: it's the simplest way to gain several digits.

Guides to improve

Practical tips for the game. They are not medical advice and don't promise to improve your health or intelligence.