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my @primes = grep &is-prime, ^Inf; my $last_p = @primes.first: :k, * >= 500; my $last_q = $last_p + 1; my @cousins = @primes.head( $last_q ) .rotor( 2 => -1 ) .map(-> (\p, \q) { p, q, p*q+2 } ) .grep( *.[2].is-prime ); say .fmt('%6d') for @cousins;
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