A109994 Chen primes p such that their p + 2 counterpart is a Sarrus number (pseudoprime to base 2).

2699, 4679, 10259, 14489, 18719, 19949, 31607, 42797, 49139, 85487, 90749, 104651, 129887, 226799, 294269, 396269, 422657, 458987, 481571, 665279, 710531, 729059, 1082399, 1251947, 1302449, 1994687, 2035151, 2510567, 2811269, 3090089

Offset

1,1

Comments

Conjecture: sequence is infinite.

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000

Mathematica

Select[Range[10^5], PrimeQ[#] && PowerMod[2, (# + 1), # + 2] == 1 && PrimeNu[# + 2] == 2 &] (* Amiram Eldar, Jun 28 2019 *)

Crossrefs

Cf. A109611, A001567.

Sequence in context: A254547 A254477 A115930 * A322525 A254805 A254798

Adjacent sequences: A109991 A109992 A109993 * A109995 A109996 A109997

Keyword

nonn

Author

Jason Earls, Sep 01 2005

Status

approved