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A177490
Primes of the form (41*10^n-23)/9.
0
2, 43, 45553, 45555553, 45555555555555555553, 45555555555555555555555555555555553, 4555555555555555555555555555555555555555555555555555553
OFFSET
1,1
MATHEMATICA
Select[(41 10^Range[0, 60]-23)/9, PrimeQ] (* Harvey P. Dale, Dec 12 2020 *)
PROG
(Magma) [a: n in [0..250] | IsPrime(a) where a is (41*10^n-23)div(9)]
CROSSREFS
Cf. A102991.
Sequence in context: A088466 A357279 A362762 * A203498 A156478 A156508
KEYWORD
nonn
AUTHOR
Vincenzo Librandi, Dec 11 2010
STATUS
approved