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

Author

Jason Earls, Sep 01 2005

Keywords

• nonn

Comments

Conjecture: sequence is infinite.

Links

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

Crossrefs

Cf. A109611, A001567.

Programs

Mathematica

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