Pyresh left behind a piece of his realizations.
Numbers are written in what looks to be a riddle of sorts.
After a sequence of numbers follows a question mark.
It's as if someone wanted their formula to be solved by another.
?(100) = 97
?(90) = 89
?(80) = 79
?(70) = ?

?(100) = 97
?(90) = 89
?(80) = 79
?(70) = ?

The answer was 67.
This problem involved finding the largest prime number
smaller than the number in the parenthesis.
You looked for a number only divisible by 1 and itself.
Your head is aching and feel dizzy,
yet you're becoming more curious about Pyresh's whereabouts.

Completion Target: Trace of Pyresh
- Solve the secret formula left behind by Pyresh and type it in the chat window

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Required actions:

1. Type the following text in the chat window: 67