1178711

This number is a prime.

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Smallest palindromic Sophie Germain prime whose sum of digits is equal to the sum of digits of its Sophie Germain prime partner (1+1+7+8+7+1+1 = 2+3+5+7+4+2+3). [Sariyar]

Submitted: 2019-02-10 15:57:04; Last Modified: 2019-02-10 21:11:43.