A261438 a(n) is the smallest prime having exactly n consecutive primitive roots.

2, 5, 11, 37, 53, 89, 83, 347, 269, 563, 467, 1187, 1907, 4007, 1559, 8363, 7727, 6803, 20327, 45119, 10559, 35279, 116639, 68903, 136223, 217367, 38639, 416387, 250799, 616103, 1308863, 998423, 661049, 4201073, 618719, 1815707, 4446119, 20227133, 701399

Offset: 1

Author

Joerg Arndt, Aug 18 2015

Keywords

• nonn

Comments

Sequence is not monotonic.

a(49) = 71369489, a(51) = 17635679, a(57) = 48796439 and a(59) = 75720089.

a(48) > 10^8. - Hiroaki Yamanouchi, Aug 22 2015

Links

• Hiroaki Yamanouchi, Table of n, a(n) for n = 1..47

Crossrefs

Cf. A261388.

See A268397 for another version.

Extensions

a(23)-a(39) from Hiroaki Yamanouchi, Aug 22 2015