Mersenne: (2^p+1)/3

[Warut Roonguthai]

Is there a known prime factor of (2^6972593+1)/3?  Is there any web page
that maintains the list of factors of (2^p+1)/3, where p is a Mersenne
prime exponent?  Numbers of this form are related to the new Mersenne
conjecture of Bateman, Selfridge, and Wagstaff.
________________________________________________________________
Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm