A107084 Integers k such that 10^k + 33 is prime.

1, 3, 6, 9, 10, 31, 47, 70, 281, 366, 519, 532, 775, 1566, 1627, 2247, 2653, 4381, 4571, 7513, 10581, 13239, 15393, 72267, 105515, 215802

Offset: 1

Author

Julien Peter Benney (jpbenney(AT)ftml.net), Jun 08 2005

Keywords

• nonn
• more

Comments

The next term, if it exists, is > 39546. - Robert Price, Aug 21 2010

See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "10033".

a(26) > 3*10^5. - Robert Price, Oct 26 2023

Examples

			For k = 3 we get 10^3 + 33 = 1000 + 33 = 1033, which is prime, so 3 is a term.
		

Links

• Makoto Kamada, Search for 10w33.
• Index entries for primes involving repunits.

Crossrefs

Cf. A049054, A088274, A088275, A095688, A108052, A108050, A108049, A108054.

Extensions

a(20)-a(23) from Robert Price, Aug 21 2010

Edited by Ray Chandler, Dec 23 2010

a(24) from Robert Price, Jan 29 2011

a(26) from Robert Price, Oct 26 2023

a(25) from Kamada data by Tyler Busby, Apr 16 2024