The On-Line Encyclopedia of Integer Sequences (OEIS)

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A067463

Primes p such that p+sigma(p+1) is prime.
(history; published version)

#8 by Alois P. Heinz at Wed Feb 17 11:04:03 EST 2021

STATUS

proposed

approved

#7 by Michel Marcus at Wed Feb 17 10:58:19 EST 2021

STATUS

editing

proposed

#6 by Michel Marcus at Wed Feb 17 10:58:07 EST 2021

PROG

(PARI) isok(p) = isprime(p) && isprime(p+sigma(p+1)); \\ Michel Marcus, Feb 17 2021

CROSSREFS

Cf. A008333, A067464.

STATUS

approved

editing

#5 by Russ Cox at Fri Mar 30 18:38:50 EDT 2012

AUTHOR

_Benoit Cloitre (benoit7848c(AT)orange.fr), _, Feb 23 2002

Discussion

Fri Mar 30

18:38

OEIS Server: https://oeis.org/edit/global/216

#4 by N. J. A. Sloane at Sun Jun 29 03:00:00 EDT 2008

NAME

primes Primes p such that p+sigma(p+1) is prime.

KEYWORD

easy,nonn,new

AUTHOR

Benoit Cloitre (abmtbenoit7848c(AT)wanadooorange.fr), Feb 23 2002

#3 by N. J. A. Sloane at Wed Sep 21 03:00:00 EDT 2005

KEYWORD

easy,nonn,new

AUTHOR

Benoit Cloitre (abcloitreabmt(AT)modulonetwanadoo.fr), Feb 23 2002

#2 by N. J. A. Sloane at Tue Jul 19 03:00:00 EDT 2005

KEYWORD

easy,nonn,new

AUTHOR

Benoit Cloitre (abcloitre(AT)wanadoomodulonet.fr), Feb 23 2002

#1 by N. J. A. Sloane at Fri May 16 03:00:00 EDT 2003

NAME

primes p such that p+sigma(p+1) is prime.

DATA

5, 13, 19, 23, 29, 37, 41, 43, 53, 59, 61, 67, 83, 101, 103, 113, 131, 149, 157, 163, 167, 193, 223, 227, 229, 239, 263, 271, 281, 283, 293, 311, 313, 331, 347, 349, 373, 397, 401, 433, 461, 467, 491, 503, 523, 563, 571, 599, 601, 607, 631, 643, 653, 661, 683

OFFSET

1,1

KEYWORD

easy,nonn

AUTHOR

Benoit Cloitre (abcloitre(AT)wanadoo.fr), Feb 23 2002

STATUS

approved