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A072828 Primes p such that p+1 is a highly composite number. 6
3, 5, 11, 23, 47, 59, 179, 239, 359, 719, 839, 1259, 5039, 7559, 10079, 55439, 110879, 166319, 665279, 1081079, 1441439, 6486479, 32432399, 61261199, 698377679, 735134399, 1102701599, 1396755359, 2205403199, 20951330399, 41902660799 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) == 2 mod 3 for n > 1 (because highly composite numbers > 4 are == 0 (mod 3); see A002182). - Jonathan Sondow, Nov 05 2015

LINKS

T. D. Noe, Table of n, a(n) for n = 1..300

Benny Lim, Prime Numbers Generated From Highly Composite Numbers, Parabola Magazine, volume 54, issue 3, 2018.

EXAMPLE

47 is a term because it is prime and also 47+1=48 is a highly composite number.

CROSSREFS

Cf. A002182, A068507, A072826, A214873.

Sequence in context: A260239 A023223 A106086 * A290114 A032803 A030494

Adjacent sequences:  A072825 A072826 A072827 * A072829 A072830 A072831

KEYWORD

nonn

AUTHOR

Shyam Sunder Gupta, Jul 21 2002

STATUS

approved

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Last modified August 26 00:35 EDT 2019. Contains 326324 sequences. (Running on oeis4.)