12

This number is a composite.

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

2¹² + 2¹² + 3¹² is prime. Note that 2*2*3 = 12. [Honaker]

The smallest oblong number that is the sum of 2 successive primes. [Honaker]

The smallest n such that the concatenate exponents in the prime factorization of n = reversal(n). Can you find the next example? [Honaker]