A177998 - OEIS

A177998

The n-digit prime with the largest number of zero decimal digits, the largest of these if there are more than one. Zero if no such prime exists.

%I #4 Mar 31 2012 10:26:16

%S 0,0,907,9007,90007,900007,8000009,40000003,700000001,9000000001,

%T 40000000003,700000000009,8000000000009,70000000000009,

%U 940000000000007,9000000000000007,70000000000000003,200000000000000003

%N The n-digit prime with the largest number of zero decimal digits, the largest of these if there are more than one. Zero if no such prime exists.

%C The largest number of zero digits in the n-digit prime is n-2, because leading zeros are ignored and the last digit is >0 for primes.

%e 3-digit primes with one zero are 101, 103, 107,.., 907. The largest of these is 907, which defines a(3).

%Y Cf. A037053, A069675, A109902.

%K nonn,base

%O 1,3

%A _Lekraj Beedassy_, May 17 2010