# 16

This number is a composite.

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16 is probably the only positive integer N such that if the
positive integers are listed in rows of N, then the first
row with no prime is immediately followed by another row
with no prime. If N=16, then the first row with no prime is
1329, 1330, 1331, 1332, 1333, 1334, 1335, 1336, 1337, 1338,
1339, 1340, 1341, 1342, 1343, 1344. The next row is 1345,
1346, 1347, 1348, 1349, 1350, 1351, 1352, 1353, 1354, 1355,
1356, 1357, 1358, 1359, 1360, which contains no prime. [Jacobs]
Submitted: 2016-07-31 10:18:00; Last Modified: 2016-07-31 10:23:46.

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