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  1. read*,n
  2. If(n.lt.2)stop
  3. Do i=2,n/2
  4. If(mod(n,i).eq.0)goto 5
  5. Print*,n,'is prime'
  6. Enddo
  7. Stop
  8. 5 Print*,n,'is not prime'
  9. Stop
  10. end
Success #stdin #stdout 0s 5288KB
stdin
11
stdout
          11 is prime
          11 is prime
          11 is prime
          11 is prime