[ September 3, 2001 ]
A titanic prime expression using only palindromes
from Jim Fougeron (email)
Jim Fougeron, a very active prime prover, found the following
prime expression of the form k*b^{e}±1. All the components used
(coefficient k, basenumber b, exponent e and constant 1) are palindromic !
The resulting prime isn't, we cannot expect too much of course.
The length of the prime nevertheless is an impressive 21264 digits.
746151647 x 2^{70607} + 1 = prime


Info source : Prime Curios! 746151647
The exponent 70607
is also the first member of a set of four palprimes in arithmetic progression
(70607, 73637, 76667, 79697) with common differences of 3030.
Info source : Palprimes in arithmetic progression