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

1,1

Links

Table of n, a(n) for n=1..13.

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

Example

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.

Crossrefs

Cf. A006567, A070905, A071614, A103172.

Sequence in context: A147069 A303312 A146471 * A059796 A214468 A112230

Adjacent sequences: A071609 A071610 A071611 * A071613 A071614 A071615

Keyword

base,more,nonn

Author

Klaus Brockhaus, May 27 2002

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

Status

approved