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Old 2020-05-02, 19:32   #3
Prime95
P90 years forever!
 
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Aug 2002
Yeehaw, FL

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In other words, there is no such prime below which all primes are known.

No one bothers to find such a prime because anyone with a computer could calculate the next prime in a few milliseconds.

I guess the closest "pseudo answer" to your question is ~10^27. Someone posted on this forum a count for the exact number of primes less than 10^27.
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