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My ‘prefix’ is a ‘prime’

My ‘infix’ is a combination of ‘primes’

My ‘suffix’ is found between ‘primes’

My whole is often found at the origin of a very long sequence!

What am I?

Small hint:

The title holds a very important clue!!

Moderate hint:

Maybe you have to think top down?

Big hint

Driving?

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2 Answers 2

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I'be been thinking for a while that the 'primes' in question here are in fact...

primary colours, prompted by the secret 'RBY' capital letters in the title (Red-Blue-Yellow).

With the latest hint, I think I see that the three '-fixes' here are actually...

the stages of a traffic light while a vehicle is waiting at a junction. (Certainly in the UK, at least...)

My ‘prefix’ is a ‘prime’

The 'prefix' (first stage) is RED, a primary colour and the colour of a stop light.

My ‘infix’ is a combination of ‘primes’

The 'infix' (middle stage) is RED and (what we'll call) YELLOW (but might more often be called 'amber') combined, the two primary colours that appear together in UK traffic lights to prompt drivers to get ready to move soon.

My ‘suffix’ is found between ‘primes’

The 'suffix' (final stage) is GREEN, the colour of the 'go' light, and which - in a rainbow - appears between yellow and blue, two primary colours.

My whole is often found at the origin of a very long sequence!

Traffic lights are often found at the start of a long series of halted cars!

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I might be interpreting the clues too literally, but I think it's

3.142, aka. pi rounded to three decimal places

Explanation:

My ‘prefix’ is a ‘prime’

3 is a prime number

My ‘infix’ is a combination of ‘primes’

2 and 7 are prime numbers, and 2x7=14

My ‘suffix’ is found between ‘primes’

Even numbers (i.e. multiples of 2) can't be prime, so you will invariably find them in between primes.

My whole is often found at the origin of a very long sequence!

You can't get much longer than infinity!

I can't figure out how this fits the title or the hints, though...

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  • $\begingroup$ My only other ideas are something involving [rot13]pbybhef (urapr gur pncvgnyvmrq EOL va gur gvgyr), or something involving [rot13]Genafsbezref ("cevzrf" cyhf gur "qevivat" uvag), but I can't make either of them fit the clues nicely enough.... $\endgroup$
    – F1Krazy
    Jan 18 at 18:22

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