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%I #7 Sep 08 2022 08:45:53
%S 43,9999943,9999999943,99999999943,99999999999999943,
%T 9999999999999999943,999999999999999999999999999999999999943,
%U 9999999999999999999999999999999999999999999999943,99999999999999999999999999999999999999999999999943,9999999999999999999999999999999999999999999999999999999999943
%N Primes of the form (10^n-57)
%o (Magma)[a: n in [2..250]|IsPrime(a) where a is 10^n-57]
%Y Cf. A108493
%K nonn
%O 1,1
%A _Vincenzo Librandi_, Dec 11 2010