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A152099
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Semiprimes based on powers of two and primes: a(n)=(2^Prime[n] - 1)*(2^Prime[n] + 1)=2^(2*Prime[n])-1.
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1
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15, 63, 1023, 16383, 4194303, 67108863, 17179869183, 274877906943, 70368744177663, 288230376151711743, 4611686018427387903, 18889465931478580854783, 4835703278458516698824703
(list; graph; refs; listen; history; internal format)
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