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A228268 Primes n of the form 1000p+q with primes p and q, 998>p>q>100. 1
107101, 109103, 127103, 131101, 131113, 137131, 139109, 149101, 149113, 157103, 157109, 157127, 163109, 163127, 163151, 167107, 167113, 167149, 173137, 173149, 179107, 179167, 179173, 181157, 191137, 191173, 193139, 193163, 193181, 197101, 197137, 199103 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Primes that are the concatenation of two 3-digit primes, 998>p>q>100.  There are exactly 1346 such primes.

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1346

MATHEMATICA

Sort[Select[1000Last[#]+First[#]&/@Subsets[Prime[Range[26, 168]], {2}], PrimeQ]]

CROSSREFS

Cf. A168499

Sequence in context: A122711 A297994 A237216 * A215783 A061332 A237866

Adjacent sequences:  A228265 A228266 A228267 * A228269 A228270 A228271

KEYWORD

fini,full,nonn

AUTHOR

Harvey P. Dale, Aug 19 2013

STATUS

approved

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Last modified September 29 17:04 EDT 2020. Contains 337432 sequences. (Running on oeis4.)