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 A321001 Primes which contain the fax number of the beast (667). 1
 1667, 6673, 6679, 10667, 15667, 16673, 25667, 31667, 34667, 36671, 36677, 39667, 42667, 45667, 46679, 49667, 52667, 54667, 55667, 56671, 57667, 61667, 63667, 64667, 66701, 66713, 66721, 66733, 66739, 66749, 66751, 66763, 66791, 66797, 70667, 76667 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Since the so-called beastly primes (containing the digit string 666) were mentioned recently in a Numberphile video (see link), I guess it is now OK to include these numbers (which are based on the old convention that your fax number was one more than your telephone number) in the OEIS. Note that there is no analog of A232448, because 1 0^k 667 0^k 1 is always divisible by 3 and is never prime. LINKS Tony Padilla and Brady Haran, The Most Evil Number, Numberphile Video, October 2018 Margaret Wertheim, The Fax Numbers of the Beast, and Other Mathematical Sports: An Interview with Neil Sloane, Cabinet Magazine, Issue 57, Spring 2015, pages 48-54. CROSSREFS Cf. beastly primes A131645, also A232448. Sequence in context: A280404 A054811 A164773 * A054812 A020392 A216590 Adjacent sequences:  A320998 A320999 A321000 * A321002 A321003 A321004 KEYWORD nonn,base AUTHOR N. J. A. Sloane, Nov 01 2018 STATUS approved

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Last modified August 6 14:19 EDT 2020. Contains 336246 sequences. (Running on oeis4.)