75

This number is a composite.

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

+ The first integer n such that the absolute value of the form n-2^k creates eight primes for eight successive values of k. Can you find another number with the same property? [Loungrides]

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