139

This number is a prime.

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

The number of odd prime days in prime months plus even composite days in composite months in a leap year. [Homewood]

2^1 + 2^3 + 2^9 +/- 1 and 2^1 + 2^3 + 2^9 + 139^2 are all prime. [Homewood]

If A = 1, B = 2, C = 3, ..., Z = 26, then 'A CALDWELL CURIO' and 'A HONAKER CURIO' have the same total (139). [Homewood]

The smallest Happy number whose Happy prime index (10) and prime number index (34) when added to the number itself are both also prime. [Homewood]