Legendre prime counting function: Difference between revisions
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m J: bugfix -- powers of 10 are not prime |
m J: a note of explanation |
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10^8: 5761455
10^9: 50847534</lang>
A complete implementation of the legendre prime counting function would be <tt>(1&p: + p:inv)</tt>:
<lang J> (1&p: + p:inv) 10
4
(1&p: + p:inv) 11
5</lang>
But we can simplify that to p:inv when we know that primes are not being tested.
=={{header|jq}}==
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