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A179205
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The smallest index k such that prime(k) *2^n *( prime(k)*2^n -1)-1 is prime.
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2
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1, 2, 1, 1, 3, 2, 3, 1, 1, 9, 8, 7, 6, 5, 14, 8, 1, 8, 14, 10, 11, 10, 6, 10, 14, 2, 23, 10, 11, 81, 8, 3, 33, 8, 22, 8, 1, 6, 7, 31, 19, 43, 10, 1, 12, 3, 23, 4, 1, 3, 61
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