17C, rain later,
Are you a game theorist? If you design a game where you gain points for finding things. The aim is to collect a score but I want to be able to work out the identity of the original finds from the value of the score.
Perhaps, the scores should each be a prime number. Then, somehow adding them up will give values that reveal the identity of the component values.
It could be applied to something like a treasure hunt or maybe, spotting driving offenses.
Today I passed a woman driving while applying nail-varnish. That should get a lower score than applying makeup in the sun-visor mirror.
Anyway, can it be done? The score identification system I mean.
Posted on my phone.
Micycle 
I think that here is a problem with your score idea. 19 + 11 = 30 = 23 + 7 . Two different sets of primes that sum to the same number, so how could you know which pair is the one you want? Probably you meant to multiply the primes together, but that way you very quickly get really big numbers.
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I didn’t think of that at the time, but a maths teaches at work suggested multiplying primes instead. A technique closer to if way encryption works, he said.
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