cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A133858 Primes of the form 11^k - 2.

Original entry on oeis.org

14639, 1771559
Offset: 1

Views

Author

Alexander Adamchuk, Sep 27 2007

Keywords

Comments

Last digit of all terms is 9.
The nest term (11^22420-2) is too large to be displayed; see A133982 for the corresponding k. - Joerg Arndt, Nov 28 2020

Examples

			a(1) = 11^4 - 2 = 14639,
a(2) = 11^6 - 2 = 1771559.

Crossrefs

Cf. A104096 (largest prime <= 11^n), A130652, A128472, A084714 (smallest prime of the form (2n-1)^k - 2).
Cf. A014224, A109080, A090669, A128455, A133982, A128457, A128458, A128459, A128460, A128461.

A133982 Numbers n such that 11^n - 2 is prime.

Original entry on oeis.org

4, 6, 22420, 27636, 27850, 28986, 31168, 586020
Offset: 1

Views

Author

Rick L. Shepherd, Sep 30 2007

Keywords

Comments

Corresponding primes are in A133858.
11^22420-2 is a 23349-digit probable prime found with PrimeForm.
a(8) > 10^5. - Robert Price, Mar 26 2014
a(4) through a(7) also correspond to probable primes. - Robert Price, Mar 27 2014

Crossrefs

Cf. A133858, A130652.

Programs

Extensions

a(4)-a(7) from Robert Price, Mar 26 2014
a(8) from Paul Bourdelais, Nov 03 2021
Showing 1-2 of 2 results.

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