Paste a number. See how to break it up so you can actually hold it.
Nobody remembers eleven separate digits. People who recall long numbers hold three or four chunks, not eleven digits — and chunking is far and away the biggest lever on how much you can hold. This splits any number the way a practised memoriser would, and suggests a reading for each piece.
George Miller's 1956 paper is usually quoted as 'seven plus or minus two', but his actual argument was about chunks, not items. The capacity limit applies to meaningful units, and a chunk can be as large as you can make it meaningful.
That is why a phone number is written in groups. Split into three pieces, an eleven-digit number sits comfortably inside anyone's span; written as eleven digits in a row, it does not.
Groups of three and four are the sizes that survive rehearsal reliably. Twos waste capacity — you end up holding more chunks than you need. Fives start to break down under any distraction.
This tool never leaves a group of one or two at the end, because a stray digit is the piece people lose first. It would rather use one four than strand a single digit.
A chunk that means something holds far longer than a chunk that does not. 1984 as a year, 747 as an aircraft, 365 as days — any association will do, and it does not have to make sense to anyone but you.
Say the chunks out loud, or under your breath. Articulated rehearsal is noticeably more durable than a silent visual impression, and it costs nothing.
Then test yourself rather than re-reading. Retrieving something from memory strengthens it more than studying it again does — one of the best-supported findings in learning research.
Grouping individual items into larger meaningful units. Capacity is limited in chunks rather than in items, so a bigger chunk means more information held for the same cost.
The famous 'seven plus or minus two' from Miller's 1956 paper was about chunks, not digits. Measured digit spans vary a lot with presentation speed, so track your own on the Number Memory Test rather than comparing to a headline figure.
They are the sizes that survive rehearsal reliably. Twos waste capacity by creating more chunks than necessary, and fives break down as soon as you are distracted.
Materially, yes. Spoken rehearsal is more durable than silent visual rehearsal, and it is the single easiest improvement available.
Yes, and nothing you type is sent anywhere — the chunking happens in your own browser.