# 39

This number is a composite.

Just showing those entries submitted by 'Rivera': (Click here to show all)

The least composite odd number that is the sum of the primes between its smallest and largest prime factors (39 = 3 * 13 = 3 + 5 + 7 + 11 + 13). [Rivera]

Concatenating the 39th row numbers of Pascal's triangle forms a prime. [Rivera]

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