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A093176
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Primes of the form 70*R_n + 1, where R_n is the repunit (A002275) of length n.
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6
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71, 7777777777771, 77777777777777777771, 77777777777777777777771, 7777777777777777777777777777771, 7777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777771
(list; graph; refs; listen; history; internal format)
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