A366929 Indices of records in A366927.

1, 2, 3, 7, 23, 47, 139, 283, 659, 1319, 8637, 20147, 83491, 169861, 999013, 3797401, 8153567, 55443959, 187814447, 646611887

Offset: 1

Author

Robert G. Wilson v, Oct 31 2023

Keywords

• nonn
• more

Comments

The primes may not be in order. a(3) = 7, but the three primes are 2, 3, and 7.

Crossrefs

Cf. A366927.

Programs

Mathematica

r = 0;
s = Array[-1 + CountDistinct@ Rest@ NestWhileList[{#1 - #1/#2, #2} & @@ {First[#], FactorInteger[First[#]][[1, 1]]} &, {#, #}, Last[#] > 1 &][[All, -1]] &, 2^16, 2];
{1}~Join~Reap[Do[If[# > r, r = #; Sow[i + 1]] &[s[[i]]], {i, Length[s]}] ][[-1, 1]] (* Michael De Vlieger, Nov 08 2023 *)