[seqfan] Incorrect bound for the prime counting function?
Peter Luschny
peter.luschny at gmail.com
Sun Mar 10 21:03:56 CET 2019
Christian Axler, NEW BOUNDS FOR THE PRIME COUNTING FUNCTION,
INTEGERS 16 (2016), page 8, last formula in corollary 3.4,
(or version 7 of the arXiv version, page 5, corollary 3.5)
https://arxiv.org/abs/1409.1780 states that:
If x >= 5.43, then PrimePi(x) < x / (log(x) - 1 - (1.17/log(x))).
Wolfram Alpha says: primepi(4096000) = 289511
Axler's bound gives: 289497.0
Can anyone confirm my observation or do I misread something?
Cheers, Peter
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