This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A385503 #18 Jul 02 2025 14:41:21 %S A385503 2,3,5,7,13,19,23,31,43,47,73,83,109,113,199,283,467,661,773,887,1109, %T A385503 1129,1327,1627,2143,2399,2477,2803,2861,2971,3739,3931,3947,4297 %N A385503 Popular primes. %C A385503 McNew says that a prime p is "popular" on an interval [2, k] if no prime occurs more frequently than p as the greatest prime factor (gpf, A006530) of the integers in that interval. - _N. J. A. Sloane_, Jul 25 2017 %C A385503 Does there exist two popular primes p < q such that q gets popular earlier than p, i.e., such that q is popular (for the first time) on [2,k] but p is not popular on [2,j] for any j < k? - _Pontus von Brömssen_, Jul 02 2025 %H A385503 Nathan McNew, <a href="http://arxiv.org/abs/1504.05985">Popular values of the largest prime divisor function</a>, arXiv:1504.05985 [math.NT], April 2015. %H A385503 Nathan McNew, <a href="https://www.researchgate.net/profile/Nathan-Mcnew/publication/275363769_Popular_values_of_the_largest_prime_divisor_function/">Popular values of the largest prime divisor function</a> (corrected version), page 16, November 2015. %H A385503 Nathan McNew, <a href="https://doi.org/10.1080/10586458.2016.1155188">The Most Frequent Values of the Largest Prime Divisor Function</a>, Exper. Math., 2017, Vol. 26, No. 2, 210-224. %Y A385503 Cf. A006530, A124661, A246033. %K A385503 nonn,more %O A385503 1,1 %A A385503 _Peter Munn_, Jul 01 2025