A101592 - OEIS

%I #12 Apr 03 2023 10:36:10

%S 2,7,11,97,101,997,1009,9973,10007,99991,100003,999983,1000003,

%T 9999991,10000019,99999989,100000007,999999937,1000000007,9999999967,

%U 10000000019,99999999977,100000000003,999999999989,1000000000039,9999999999971,10000000000037

%N Smallest and largest of the n-digit primes.

%H Harvey P. Dale, <a href="/A101592/b101592.txt">Table of n, a(n) for n = 1..1000</a>

%H Chris K. Caldwell <a href="https://t5k.org/lists/small">List of small primes</a>.

%e 2 is the smallest 1-digit prime and 7 is the largest 1-digit prime.

%e 100003 is the smallest 6-digit prime and 999983 is the largest 6-digit prime.

%t Table[{NextPrime[10^n],NextPrime[10^(n+1),-1]},{n,0,15}]//Flatten (* _Harvey P. Dale_, Jun 04 2019 *)

%Y Cf. A003617, A003618

%K nonn,base

%O 1,1

%A _Parthasarathy Nambi_, Jan 26 2005