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A034819 Concatenations C1 and C2 and C3 and C4 are all prime (see the comment lines). +0
1
51, 63, 123, 597, 687, 987, 4429, 12237, 18291, 20013, 29953, 31863, 34653, 48023, 52703, 57147, 59337, 62097, 66727, 71733, 81263, 86589, 101211, 105501, 118617, 121397, 134013, 146191, 147151, 155937, 174723, 175797, 179191, 180189, 205287 (list; graph; listen)
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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.


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