The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A233009

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A233009

Exponents p of the Mersenne primes 2^p - 1 (see A000043) read mod 23.
(history; published version)

#37 by Joerg Arndt at Tue Oct 15 04:31:16 EDT 2024

STATUS

reviewed

approved

#36 by Stefano Spezia at Tue Oct 15 00:55:47 EDT 2024

STATUS

proposed

reviewed

#35 by Amiram Eldar at Tue Oct 15 00:17:09 EDT 2024

STATUS

editing

proposed

#34 by Amiram Eldar at Tue Oct 15 00:13:43 EDT 2024

CROSSREFS

Cf. A000043, A126043-A126059, A233008, A233010.

#33 by Amiram Eldar at Tue Oct 15 00:13:03 EDT 2024

EXAMPLE

For n = 9, the 9th Mersenne prime index is A000043(9) = 61 and a(9) = 61 mod 23 = 15.

#32 by Amiram Eldar at Tue Oct 15 00:12:32 EDT 2024

NAME

Exponents p of the Mersenne primes 2^p - 1 (see A000043) read mod 23.

#31 by Amiram Eldar at Tue Oct 15 00:10:44 EDT 2024

DATA

2, 3, 5, 7, 13, 17, 19, 8, 15, 20, 15, 12, 15, 9, 14, 18, 4, 20, 21, 7, 6, 5, 12, 19, 12, 2, 15, 16, 11, 6, 6, 1, 15, 9, 7, 21, 5, 5, 3, 1, 19, 21, 22, 6, 6, 7, 6, 3

LINKS

C. Chris K. Caldwell, <a href="http://www.utm.edu/research/primes/largest.html#largest">Recent Mersenne primes</a>.

W. Walter Wegscheider, <a href="http://www.austromath.at/mersenne/mersenne-primzahlen.html">Liste der Mersenne-Primzahlen</a>, Pädagogische Hochschule für Niederösterreich (in German).

FORMULA

a(n) = A000043(n) mod 23.

KEYWORD

nonn,more,less

EXTENSIONS

a(48) from Amiram Eldar, Oct 15 2024

STATUS

approved

editing

#30 by Bruno Berselli at Sun Aug 19 09:35:51 EDT 2018

STATUS

reviewed

approved

#29 by Joerg Arndt at Sun Aug 19 08:19:03 EDT 2018

STATUS

proposed

reviewed

#28 by Gord Palameta at Sun Aug 19 03:23:28 EDT 2018

STATUS

editing

proposed