12191...19121 (37-digits)

This number is a prime.

1219113 0363711159 7579511173 6303119121

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A prime with prime sum of digits that forms the bottom row in a Palindromic Prime Pyramid of Step Size Two which begins: 5, 97579, 159757951, .... [Patterson]

Submitted: 2003-08-17 19:43:03; Last Modified: 2008-01-30 17:28:00.