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A034821 Concatenations C1 and C2 are both prime (see the comment lines). +0
14
5, 17, 103, 127, 157, 191, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 227, 234, 235, 236, 237, 238, 258, 259, 260, 261, 262, 307, 347, 354, 355, 356, 357, 358, 431, 524, 525, 526, 527, 528, 529, 530, 531, 532, 533, 534, 535, 536, 537, 538, 539 (list; graph; listen)
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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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