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A057878 Primes with 2 distinct digits that remain prime (no leading zeros allowed) after deleting all occurrences of its digits d. 1

%I #11 Jul 11 2022 02:10:30

%S 23,37,53,73,113,131,151,211,311,11111111111111111131,

%T 11111111111111117111,11111111111131111111,11111111131111111111,

%U 111111111111111111111113,111111111111111112111111,111111111111111121111111,111111111112111111111111,111111115111111111111111

%N Primes with 2 distinct digits that remain prime (no leading zeros allowed) after deleting all occurrences of its digits d.

%C Digits 0, 4, 6, 8, and 9 can never occur; digits 2, 3, 5, 7 can occur at most once in a term; every other digit is a 1. - _Sean A. Irvine_, Jul 11 2022

%Y Cf. A057876-A057883, A004022, A004023, A051362, A034302-A034305.

%K nonn,base

%O 1,1

%A _Patrick De Geest_, Oct 15 2000

%E More terms from _Sean A. Irvine_, Jul 11 2022

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Last modified April 24 14:54 EDT 2024. Contains 371960 sequences. (Running on oeis4.)