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A103203 Primes which have more primitive roots than any smaller prime. 5
2, 5, 11, 17, 23, 29, 41, 47, 53, 59, 83, 107, 137, 149, 167, 173, 179, 227, 257, 263, 269, 293, 317, 347, 359, 383, 389, 467, 479, 503, 509, 557, 563, 587, 653, 719, 773, 797, 809, 839, 857, 863, 887, 929, 977, 983, 1019, 1049, 1097, 1109, 1187, 1229 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Jeppe Stig Nielsen, Table of n, a(n) for n = 1..100000

PROG

(PARI) my(record=0, r); forprime(p=2, 1500, r=eulerphi(p-1); if(r>record, record=r; print1(p, ", "))) \\ Jeppe Stig Nielsen, Oct 18 2019

CROSSREFS

Cf. A103521, A121519, A008330.

Sequence in context: A156830 A140556 A003627 * A105875 A031368 A020613

Adjacent sequences:  A103200 A103201 A103202 * A103204 A103205 A103206

KEYWORD

nonn

AUTHOR

Don Reble, Mar 19 2005

STATUS

approved

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Last modified July 24 14:21 EDT 2021. Contains 346273 sequences. (Running on oeis4.)