Prime Pair Sets
The primes , , , and , are quite remarkable. By taking any two primes and concatenating them in any order the result will always be prime. For example, taking and , both and are prime. The sum of these four primes, , represents the lowest sum for a set of four primes with this property.
Find the lowest sum for a set of five primes for which any two primes concatenate to produce another prime.
素数对集合
、、和是非常特别的一组素数。任取其中的两个并且以任意顺序连接起来,其结果仍然是个素数。例如,选择和,得到和均为素数。这四个素数的和是,而且是满足这个性质的一组四个素数的最小和。
若有一组五个素数,任取其中的两个并且以任意顺序连接起来,其结果仍然是个素数,求这样一组素数的最小和。
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