A259631 Numbers k such that the Phi_3(10^10000+k) is prime, where Phi is a cyclic polynomial.

8929, 45937, 49256, 50060, 76204, 76855, 125708, 127919, 137050, 137335, 137944, 147466, 163822, 193939, 267131, 295882, 299977, 312610, 322255, 322499, 322988, 370763, 403085, 436060, 458119, 571253, 574597, 601558, 610697, 626978, 627820, 630109, 647039

Offset

1,1

Comments

a(53) > 10^6.

Links

Robert Price, Table of n, a(n) for n = 1..52

Mathematica

Select[Range[1, 10^6], PrimeQ[(10^10000 + #)^2 + (10^10000 + #) + 1] &]

Prog

(PARI) is(k)=ispseudoprime(subst('x^2+'x+1, 'x, 10^10000+k)) \\ Charles R Greathouse IV, Aug 05 2015
(PFGW) ABC2 (10^10000+$a)^2 + (10^10000+$a) + 1
a: from 1 to 10000
Charles R Greathouse IV, Aug 05 2015

Crossrefs

Cf. A002061, A002383, A002384.

Sequence in context: A065235 A087167 A290811 * A251921 A217604 A218389

Adjacent sequences: A259628 A259629 A259630 * A259632 A259633 A259634

Keyword

nonn

Author

Robert Price, Aug 05 2015

Status

approved