A Brier number is a number that is both a Riesel number and a Sierpiński number of the
second kind, i.e., a number 
such that for all 
, the numbers 
and 
are composite. The first few are 878503122374924101526292469,
3872639446526560168555701047, 623506356601958507977841221247, ... (OEIS A076335).
Brier Number
See also
Riesel Number, Sierpiński Number of the Second KindExplore with Wolfram|Alpha
References
Gallot, Y. "A Search for Some Small Brier Numbers." http://perso.wanadoo.fr/yves.gallot/papers/smallbrier.html.
McLean, J. "Brier
Numbers." http://www.glasgowg43.freeserve.co.uk/brier2.htmRivera,
C. "Problems & Puzzles: Problem 029.-Brier Numbers." http://www.primepuzzles.net/problems/prob_029.htm.Sloane,
N. J. A. Sequence A076335 in "The
On-Line Encyclopedia of Integer Sequences."Referenced on Wolfram|Alpha
Brier NumberCite this as:
Weisstein, Eric W. "Brier Number." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/BrierNumber.html