A109936 Composite numbers between largest n-digit prime and the smallest (n+1) digit prime.

8, 9, 10, 98, 99, 100, 998, 999, 1000, 1001, 1002, 1003, 1004, 1005, 1006, 1007, 1008, 9974, 9975, 9976, 9977, 9978, 9979, 9980, 9981, 9982, 9983, 9984, 9985, 9986, 9987, 9988, 9989, 9990, 9991, 9992, 9993, 9994, 9995, 9996, 9997, 9998, 9999, 10000

Offset: 1

Author

Amarnath Murthy, Jul 19 2005

Keywords

• base
• easy
• nonn

Programs

Mathematica

Flatten[Table[Range[NextPrime[10^n,-1]+1,NextPrime[10^n]-1],{n,5}]] (* Harvey P. Dale, Nov 03 2011 *)