A228268 - OEIS

A228268

Primes n of the form 1000p+q with primes p and q, 998>p>q>100.

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

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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