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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
23, 37, 53, 73, 113, 131, 151, 211, 311, 11111111111111111131, 11111111111111117111, 11111111111131111111, 11111111131111111111, 111111111111111111111113, 111111111111111112111111, 111111111111111121111111, 111111111112111111111111, 111111115111111111111111
OFFSET
1,1
COMMENTS
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
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Oct 15 2000
EXTENSIONS
More terms from Sean A. Irvine, Jul 11 2022
STATUS
approved