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A096505 Primes of [1+repdigit] form. Primes whose totient is repdigit. 2

%I #5 Oct 15 2013 22:32:26

%S 3,5,7,23,67,89,223,666667,22222223,66666667,666666667,22222222223,

%T 66666666667,88888888888889,88888888888888889,66666666666666666667,

%U 66666666666666666666667,88888888888888888888888888888888889

%N Primes of [1+repdigit] form. Primes whose totient is repdigit.

%e n=89 prime, its totient=88 is a decimal repdigit.

%Y Cf. A096503, A096504, A000010.

%K base,nonn

%O 1,1

%A _Labos Elemer_, Jul 12 2004

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Last modified April 24 16:34 EDT 2024. Contains 371961 sequences. (Running on oeis4.)