96714...49497 (25-digits)

This number is a prime.

                                                 96714 0655691703 3397649497

The 8th prime of the form 2^pn + p{n+1} for consecutive primes (pn, p{n+1}). For pn = 83 and p{n+1} = 89, 2^83 + 89 = 9671406556917033397649497 is prime. A prime number is of the form 2^p1 + p2 where p1 & p2 are the consecutive primes. For example 2^2 + 3 = 7 2^3 + 5 = 13 2^7 + 11 = 139 2^13 + 17 = 8209 2^23 + 29 = 8388637 2^37 + 41 = 137438953513 2^67 + 71 = 147573952589676412999 2^83 + 89 = 9671406556917033397649497 [Hara Gopal R]