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A055626 First prime starting a chain of exactly n consecutive primes congruent to 5 modulo 6. +0
5
5, 23, 47, 251, 1889, 7793, 43451, 243161, 726893, 759821, 2280857, 1820111, 10141499, 40727657, 19725473, 136209239, 744771077, 400414121, 1057859471, 489144599, 13160911739, 766319189, 38451670931, 119618704427, 21549657539 (list; graph; listen)
OFFSET

1,1

COMMENT

The term "exactly" means that before the first and after the last primes of chain, the immediate primes are not congruent to 5 modulo 6.

a(21)>2^31, a(22)= 766319189. - Hugo Pfoertner (hugo(AT)pfoertner.org), Jul 31 2003

LINKS

J. K. Andersen, Consecutive Congruent Primes.

PROGRAM

See link in A085516.

CROSSREFS

Cf. A055623, A055624, A055625, A085516.

Sequence in context: A107011 A031387 A057622 this_sequence A127200 A147113 A140811

Adjacent sequences: A055623 A055624 A055625 this_sequence A055627 A055628 A055629

KEYWORD

nonn

AUTHOR

Labos E. (labos(AT)ana.sote.hu), Jun 05 2000

EXTENSIONS

More terms from Reiner Martin (reinermartin(AT)hotmail.com), Jul 18 2001

More terms from Hugo Pfoertner (hugo(AT)pfoertner.org), Jul 31 2003

More terms from Jens Kruse Andersen (jens.k.a(AT)get2net.dk), May 30 2006

More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Oct 27 2006

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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