In number theory, Skewes' number is any of several extremely large numbers used by the South African mathematician Stanley Skewes as upper bounds for the smallest natural number x for which
where π is the prime-counting function and li is the logarithmic integral function. These bounds have since been improved by others: there is a crossing near . It is not known whether it is the smallest.
Read more about Skewes' Number: Skewes' Numbers, More Recent Estimates, Riemann's Formula
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