Concatenate two primes is also prime: Difference between revisions

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@@ Line 22: / Line 22: @@
         p2 = number(ps21)
         if isprime(n) and isprime(m)
-        if isprime(p1)
+           if isprime(p1)
-           pf = find(prime,p1)
+              pf = find(prime,p1)
-           if pf < 1
+              if pf < 1
-              add(prime,p1)
+                 add(prime,p1)
+              ok
            ok
-        ok
+           if isprime(p2)
-        if isprime(p2)
+              pf = find(prime,p2)
-           pf = find(prime,p2)
+              if pf < 1
-           if pf < 1
+                 add(prime,p2)
-              add(prime,p2)
+              ok
            ok
-        ok
         ok
     next