Ultra useful primes: Difference between revisions

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	An '''ultra-useful prime''' is a member of the sequence where each <span style="font-size:125%;">'''a(n)'''</span> is the smallest positive integer <span style="font-size:125%;">'''k'''</span> such that <span style="font-size:125%;">'''2<sup>(2<sup>n</sup>)</sup> - k'''</span> is prime.		An '''ultra-useful prime''' is a member of the sequence where each <span style="font-size:125%;">'''a(n)'''</span> is the smallest positive integer <span style="font-size:125%;">'''k'''</span> such that <span style="font-size:125%;">'''2<sup>(2<sup>n</sup>)</sup> - k'''</span> is prime.