A020228 Pseudoprimes to base 100.

9, 33, 91, 99, 153, 259, 303, 451, 481, 561, 657, 703, 909, 949, 1111, 1233, 1241, 1729, 1891, 2047, 2329, 2409, 2701, 2821, 2871, 2981, 3333, 3367, 4141, 4187, 4521, 5461, 5551, 6001, 6533, 6541, 6601, 6931, 7107, 7373, 7471, 7633, 7777, 8149, 8401, 8911

Offset: 1

Author

David W. Wilson

Keywords

• nonn

Comments

Composite numbers n such that 100^(n-1) == 1 (mod n). - Michel Lagneau, Feb 18 2012

Links

• T. D. Noe, Table of n, a(n) for n = 1..1000
• Index entries for sequences related to pseudoprimes

Crossrefs

Cf. A001567 (pseudoprimes to base 2).

Programs

Mathematica

base = 100; t = {}; n = 1; While[Length[t] < 100, n++; If[! PrimeQ[n] && PowerMod[base, n-1, n] == 1, AppendTo[t, n]]]; t (* T. D. Noe, Feb 21 2012 *)