Ramanujan prime

Ramanujan primes are the integers Rn that are the smallest to satisfy the condition π(x) - π(x/2) ≥ n, for all x ≥ Rn. In other words, there are at least n primes between x/2 and x, whenever x is greater than or equal to Rn. The sequence begins 2, 11, 17, 29, 41, ....

Printed from the PrimePages <primes.utm.edu> © Chris Caldwell.