Numbers of Primes with at most n Digits/Historical Note
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Historical Note on Numbers of Primes with at most n Digits
The number of primes less than $10^{10}$ was calculated by Derrick Norman Lehmer.
Sources
- 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $455,052,511$
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $455,052,511$