191,918,080,818,091,909,090,909,190,818,080,819,191

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Number

$191 \, 918 \, 080 \, 818 \, 091 \, 909 \, 090 \, 909 \, 190 \, 818 \, 080 \, 819 \, 191$ is:

A prime number

A palindromic Sophie Germain prime $N$ such that $2 N + 1$ is also a palindromic Sophie Germain prime and $2 \left({2 N + 1}\right) + 1$ is also a palindromic prime number (but not a Sophie Germain prime)

Also see

• Sequence of Palindromic Sophie Germain Primes

Sources

• 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $191,918,080,818,091,909,090,909,190,818,080,819,191$