A071612 a(n) is the smallest prime that is the first of n consecutive primes which are all emirps.

13, 13, 71, 733, 1193, 1193, 1193, 1193, 1193, 1193, 1477271183, 9387802769, 15423094826093

Offset: 1

Author

Klaus Brockhaus, May 27 2002

Keywords

• base
• more
• nonn

Examples

			1193,1201,1213,1217,1223,1229,1231,1237,1249,1259 are ten consecutive primes which are all emirps and 1193,1201,1213,1217,1223 is the first occurrence of five consecutive primes which are all emirps, so a(5) = a(6) = a(7) = a(8) = a(9) = a(10) = 1193.
		

Links

• Chris K. Caldwell and G. L. Honaker, Jr., Prime Curios! 9387802769

Crossrefs

Cf. A006567, A070905, A071614, A103172.

Extensions

By studying terms of the sequence A103172 we can deduce that a(11), a(12) are 1477271183 & 9387802769. - Farideh Firoozbakht, Jun 17 2010

a(13) from Giovanni Resta, Apr 23 2021