Data update

Task/Emirp-primes/Ada/emirp-primes.ada

@@ -1,69 +0,0 @@
-with Ada.Text_IO, Miller_Rabin;
-
-procedure Emirp_Gen is
-
-   type Num is range 0 .. 2**63-1; -- maximum for the gnat Ada compiler
-
-   MR_Iterations: constant Positive := 25;
-     -- the probability Pr[Is_Prime(N, MR_Iterations) = Probably_Prime]
-     -- is 1 for prime N and < 4**(-MR_Iterations) for composed N
-
-   function Is_Emirp(E: Num) return Boolean is
-      package MR is new Miller_Rabin(Num); use MR;
-
-      function Rev(E: Num) return Num is
-	 N: Num := E;
-	 R: Num := 0;
-      begin
-	 while N > 0 loop
-	    R := 10*R + N mod 10; -- N mod 10 is least significant digit of N
-	    N := N / 10;          -- delete least significant digit of N
-	 end loop;
-	 return R;
-      end Rev;
-
-      R: Num := Rev(E);
-   begin
-      return E /= R and then
-	     (Is_Prime(E, MR_Iterations) = Probably_Prime) and then
-	     (Is_Prime(R, MR_Iterations) = Probably_Prime);
-   end Is_Emirp;
-	
-   function Next(P: Num) return Num is
-      N: Num := P+1;
-   begin
-      while not (Is_Emirp(N)) Loop
-	 N := N + 1;
-      end loop;
-      return N;
-   end Next;
-
-   Current: Num;
-   Count: Num := 0;
-
-begin
-   -- show the first twenty emirps
-   Ada.Text_IO.Put("First 20 emirps:");
-   Current := 1;
-   for I in 1 .. 20 loop
-      Current := Next(Current);
-      Ada.Text_IO.Put(Num'Image(Current));
-   end loop;
-   Ada.Text_IO.New_Line;
-
-   -- show the emirps between 7700 and 8000
-   Ada.Text_IO.Put("Emirps between 7700 and 8000:");
-   Current := 7699;
-   loop
-      Current := Next(Current);
-      exit when Current > 8000;
-       Ada.Text_IO.Put(Num'Image(Current));
-   end loop;
-
-   -- the 10_000th emirp
-   Ada.Text_IO.Put("The 10_000'th emirp:");
-   for I in 1 .. 10_000 loop
-      Current := Next(Current);
-   end loop;
-   Ada.Text_IO.Put_Line(Num'Image(Current));
-end Emirp_Gen;