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Anonymous
1, 7, 49 and 343.
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343 is not prime. 343 = 7 * 7 * 7
All multiples of 343, which is an infinite number. The first five are: 343, 686, 1029, 1372, 1715.
49 X 7 = 343
It is: 73 = 343
1, 7, 49 and 343 since 343 = 73