A133833 Smallest and largest primes with number of decimal digits equal to n-th prime.

11, 97, 101, 997, 10007, 99991, 1000003, 9999991, 10000000019, 99999999977, 1000000000039, 9999999999971, 10000000000000061, 99999999999999997, 1000000000000000003, 9999999999999999961

Offset: 1

Author

Parthasarathy Nambi, Jan 06 2008

Keywords

• nonn
• base

Examples

			11, 97 are respectively the smallest and the largest 2-digit primes.
101, 997 are respectively the smallest and the largest 3-digit primes.
10007, 99991 are respectively the smallest and the largest 5-digit primes.
		

Crossrefs

Cf. A000040, A064490.

Programs

Mathematica

Table[{NextPrime[10^(n-1)],NextPrime[10^n,-1]},{n,Prime[Range[8]]}] // Flatten (* Harvey P. Dale, Nov 21 2018 *)

Extensions

More terms from Harvey P. Dale, Nov 21 2018