# 309427398372577

This number is a prime.

30942 7398372577

The smallest odd prime that is the sum of the first *k*
primes in the following sequence: a(1) = 2; for n>=1, a(n+1)
is the smallest palindromic prime with a(n) as a central
substring, i.e., 309427398372577 = 2 + 727 + 37273 +
333727333 + 93337273339 + 309333727333903.

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