  In Pacific J. Math. 292 (2018), 223-238, Shareshian and Woodroofe asked if
for every positive integer $n$ there exist primes $p$ and $q$ such that, for
all integers $k$ with $1 \leq k \leq n-1$, the binomial coefficient
$\binom{n}{k}$ is divisible by at least one of $p$ or $q$. We give conditions
under which a number $n$ has this property and discuss a variant of this
problem involving more than two primes. We prove that every positive integer
$n$ has infinitely many multiples with this property.
