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Primes where the first digit is not a prime but all the other digits are primes.
1

%I #3 Apr 03 2023 10:36:11

%S 13,17,43,47,67,83,97,127,137,157,173,433,457,653,673,677,823,827,853,

%T 857,877,937,953,977

%N Primes where the first digit is not a prime but all the other digits are primes.

%H Chris Caldwell, <a href="https://t5k.org/lists/small/1000.txt">The First 1,000 Primes </a>

%e 977 is a prime in which the first digit is not a prime but all the other digits are primes.

%Y Cf. A000040

%K nonn,base

%O 1,1

%A _Parthasarathy Nambi_, Feb 09 2009