Waking from a dreamers sleep..

[Kis]

I am asking on behalf of my mother. When I was a baby (27 years ago) my mum woke from a dreamless sleep and had these exact numbers in her head - 5 9 10 000. She has always remembered them. Does anyone know what this may symbolise if anything at all?

[dream jo]

yep wev all had dreams lk ths of nybrs or letrs or so on we do amot dreams iv had u cud do a tv seris ;o lol i u cud
iv had 1 dream on of for yrs its dro me nuts on of me in helcoptr in 2 abden nevr bean 2 abeden iv not but evry nw agn i get ths dresm dream i do

[H:O:R:A:C:E]

it must've been a fairly profound 'non-dream' experience to have placed
those digits in memory so firmly.
it seems to be a sequence, or perhaps a code/password of some kind.
i'm clueless as to what they might signify, or the purpose for knowing it.
the 5 9 might indicate an age of 59 years(?)
the 10 might correlate to "full effort" (like turning a knob all the way up) (?)
the triple zero might be relating to a fresh start of something (?)