Recent content by Cheung

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    Undergrad Calculating the number of terms in sequences

    How does one calculate the number of terms in the sequence \sum\limits_{a=2}^k \sum\limits_{b=a}^k of 1/(a*b).
    • Cheung
    • Thread
    • Sequences Terms
    • Replies: 2
    • Forum: Calculus
  2. C

    Graduate Number of Primes between two integers

    Thank you both for your reply's and to jbriggs444 I would consider using the logarithmic pi(x) an algorithm. I am looking for a formula/ function that would shed more light on the distribution of primes by solving for the number of primes using only the two integer limits.
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    Graduate Number of Primes between two integers

    Is there a formula to calculate the EXACT number of primes between two integers? There are many very good ways of ESTIMATING the number but I have found very few that give the EXACT number, and those that do essentially require the knowledge of primes before hand (Legendre and Miessel.) While...