A095995 Primes of the form 100n - 1.

199, 499, 599, 1399, 1499, 1699, 1999, 2099, 2399, 2699, 2999, 3299, 3499, 4099, 4799, 4999, 5099, 5399, 6199, 6299, 6599, 6899, 7499, 7699, 8599, 8699, 8999, 9199, 10099, 10399, 10499, 10799, 11299, 11399, 11699, 12799, 12899, 13099, 13399

Offset: 1

Author

Alonso del Arte, Jul 19 2004

Keywords

• nonn
• easy

Comments

If n is of the form 3x + 1 then 100n - 1 will be of the form 100*3x + 99, that is, a multiple of 3. The factorizations of other nonprime 100n - 1 has a much more complicated pattern.

Examples

			a(2)=499 because 499 = 100 * 5 - 1.
		

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A062800.

Programs

Magma

[a: n in [0..135] | IsPrime(a) where a is 100*n-1]; // Vincenzo Librandi, Jul 17 2012

Mathematica

Select[ 100Range[134] - 1, PrimeQ[ # ] &]
Select[Table[100n-1,{n,0,800}],PrimeQ] (* Vincenzo Librandi, Jul 17 2012 *)

Extensions

Edited by Robert G. Wilson v, Jul 23 2004