A289661 a(n) is the smallest m such that p = n-th popular prime = A385503(n) is popular on the interval [2,m].

2, 3, 45, 70, 1456, 4845, 20332, 46345, 106812, 153032, 592760, 2484190, 2620033, 2623860, 41163150, 237321819, 1966462280, 13690728506, 64322151699, 79838726306, 220355977754, 232268764689, 618745965579, 1882062393429, 9607711921430, 19364051434020, 26393150922356, 37636607775855, 114514665136326, 173974642506024, 228013323182523, 259772852488365, 284600479332862, 644741545074402

Offset: 1

Author

N. J. A. Sloane, Jul 25 2017

Keywords

• nonn

Comments

See A385503 for further links and information.

Links

• Nathan McNew, Popular values of the largest prime divisor function (corrected version), page 16, November 2015.

Crossrefs

Cf. A006530, A385503, A289662-A289665.

Extensions

Edited, with terms updated from revised version of McNew, by Peter Munn, Jul 04 2025