From hdubner1@CompuServe.com Wed Feb 24 14:26:02 1999
Date: Tue, 23 Feb 1999 09:17:57 -0500
From: Harvey Dubner <hdubner1@CompuServe.com>
To: NMBRTHRY@LISTSERV.NODAK.EDU
Subject: Palindromic Prime Record

I have just found the largest known palindromic prime:

P = 1000...0004300034000...0001  ,   19391 digits.

Note that the number of digits is a palidromic prime  (no accident).

P can also be expressed as,

P = 10^19390 + 4300034*10^9692 + 1

The search took the equivalent of about 66 days on a Pentium/200, which was
not far from the expected time.  The previous record for such a prime was
16361 digits.

Harvey Dubner