# Re: Mnemonics

*From*: rossum <rossum48@xxxxxxxxxxxx>*Date*: Sat, 10 Oct 2009 14:26:30 +0100

On Sat, 10 Oct 2009 11:15:23 +0200, Mok-Kong Shen

<mok-kong.shen@xxxxxxxxxxx> wrote:

Hi,3 -> 3333rd prime + 333

Mnemonics could sometimes help memorize or locate longer text

sequences. If a mnemomic is very short, does this imply that the

corresponding text sequence is 'effectively' very short as well

in the sense of information content ("entropy")? As a contrived

example, if I use the digit 3 to remember the sum of the 33333333-th

prime number plus 33, wouldn't the longer number obtained be defacto

'equivalent' to the single digit '3' in that sense?

3 -> 3333333rd prime + 3

3 -> 33 digits of pi following digit 33333333

etc.

IMHO your mnemonic requires extra information in order to be useful.

HTH YMMV

rossum

A related question is whether one could somehow roughly compare

the diverse types of mnemonics in respect of their 'efficiency'.

I am aware that this question is fairly 'imprecise' and the

answer would likely be of corresponding precision but I suppose

even some very very rough ordinal scale of comparision, if available,

could nonetheless be of practial values.

Thanks,

M. K. Shen

.

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