A062658 Numbers k such that 92^k - 91^k is prime.

3, 827, 9439, 27701, 36683

Offset

1,1

Comments

Terms greater than 1000 are often only strong pseudoprimes.

a(6) > 10^5. - Robert Price, Aug 05 2015

Links

Table of n, a(n) for n=1..5.

Mathematica

Select[Range[0, 10000], If[PrimeQ[#], PrimeQ[92^# - 91^#]] &]  (* Robert Price, Aug 05 2015 *)

Prog

(PARI) is_ok(n)=isprime(92^n-91^n);
first(m)=my(v=vector(m), k=3); v[1]=3; for(i=2, m, while(!is_ok(k), k++); print1(k, ", "); v[i]=k; k++; ); v; /* Anders Hellström, Aug 05 2015 */

Crossrefs

Cf. A000043, A057468, A059801, A059802, A062572-A062666.

Sequence in context: A287695 A083250 A096086 * A266654 A332183 A000723

Adjacent sequences: A062655 A062656 A062657 * A062659 A062660 A062661

Keyword

nonn,hard

Author

Mike Oakes, May 18 2001, May 19 2001

Extensions

a(4)-a(5) from Robert Price, Aug 05 2015 (Computer run by Adam Marciniec)

Status

approved