A057483 Numbers n such that x^n + x^13 + 1 is irreducible over GF(2).

28, 31, 33, 84, 87, 103, 174, 414, 574, 687, 780, 1111, 1449, 1860, 6964, 7708, 11700, 17428, 19398, 19876, 78391, 131305, 136564, 181684

Offset: 1

Author

Robert G. Wilson v, Sep 27 2000

Keywords

• nonn
• more

Comments

Any subsequent terms are > 300000.

Links

• Lucas A. Brown, Python program.
• Lucas A. Brown, Sage program.

Crossrefs

Cf. A002475.

Programs

PARI

is(k) = polisirreducible(Mod(1, 2)*(x^k + x^13 + 1)); \\ Jinyuan Wang, Apr 15 2020

Extensions

a(11)-a(14) from Jinyuan Wang, Apr 15 2020

a(15)-a(24) from Lucas A. Brown, Nov 29 2022