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A068680
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Primes formed by the concatenation n, n+2, n.
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2
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131, 353, 797, 171917, 232523, 272927, 293129, 313331, 333533, 373937, 495149, 515351, 575957, 596159, 616361, 636563, 676967, 737573, 777977, 798179, 838583, 878987, 899189, 103105103, 109111109, 111113111, 129131129, 133135133
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