A019354 Primes with primitive root 28.

5, 11, 13, 17, 23, 41, 43, 67, 71, 73, 79, 89, 101, 107, 173, 179, 181, 191, 229, 257, 263, 269, 293, 313, 331, 347, 353, 359, 379, 397, 409, 431, 433, 443, 461, 463, 487, 491, 499, 509, 521, 571, 577, 593, 599, 659, 661, 677, 683, 733, 739, 743, 751, 769, 773, 797, 827

Offset: 1

Author

David W. Wilson

Keywords

• nonn

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..1000
• Index entries for primes by primitive root

Programs

Mathematica

pr=28; Select[Prime[Range[200]], MultiplicativeOrder[pr, # ] == #-1 &]
Join[{5,11,13,17,23},Select[Prime[Range[150]],MemberQ[ PrimitiveRootList[ #],28]&]] (* Harvey P. Dale, Jan 17 2022 *)