= Joint coprimality
{title2=$\gcd(a_1,\ldots,a_r)=1$}
= Jointly coprime integers
{synonym}
A list of <integers> $a_1,\ldots,a_r$, with $r\ge2$, has <joint coprimality> when its <greatest common divisor> is one; define that <greatest common divisor> by repeated application of the two-input operation. For <positive integers>, no <prime factor> may divide every entry. Thus $6,10,15$ have <joint coprimality> but fail <pairwise coprimality>. For two entries, the conditions coincide.
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