15

This number is a composite.

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

+ The only known number n such that adding to it each of the first six powers 2^n, (where n = 1 to 6), the result is always a prime. [Loungrides]

(There are 5 curios for this number that have not yet been approved by an editor.)

Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell