Editing Mnemonic major system (section)

==Practice==
Memory feats centered around numbers can be performed by experts who have learned a 'vocabulary' of at least one image for each 1 and 2-digit number, as these can then be combined to form narratives. Learning a vocabulary of 3-digit numbers is harder, because ten times more images need to be learned for each extra digit. Many mnemonists, however, can use a set of over 1000 images.

The combination of images into a narrative is easier to do rapidly than forming a coherent grammatical sentence. This pre-memorisation and practice at forming images reduces the time required to think up a good imaginary object while creating a strong memorable impression of it.  The best words for this purpose are usually nouns, especially those for distinctive objects such as those which make strong impressions on a variety of senses (e.g. "Lime" for 53, as its taste, smell, colour, and even texture are distinctive) or which move (e.g. "arrow" for 4). For basic proficiency, a large vocabulary of image words is not really necessary, since when the table above is reliably learned, it is easy to form your own words ad hoc.