A086563 Smallest number of the form 10^k +1 with n distinct prime divisors.

2, 10001, 1001, 100000000001, 1000000001, 1000000000000000000000000000000000001, 1000000000000001, 1000000000000000000000000000000001, 1000000000000000000000000000000000000001

Offset: 1

Author

Amarnath Murthy, Aug 31 2003

Keywords

• nonn

Examples

			a(5) = 1000000001= 7*11*13*19*52579 has five prime divisors.
		

Crossrefs

Cf. A085564.

Programs

Mathematica

With[{c=10^Range[0,40]+1},Flatten[Table[Select[c,PrimeNu[#]==n&,1],{n,10}]]] (* Harvey P. Dale, Aug 12 2012 *)

Extensions

More terms from Sascha Kurz, Sep 22 2003