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A052078 Smallest prime formed by concatenating n consecutive decreasing numbers, 0 if no such prime exists. 3
2, 43, 0, 10987, 76543, 0, 73727170696867, 4645444342414039, 0, 56555453525150494847, 219218217216215214213212211210209, 0, 25242322212019181716151413, 6059585756555453525150494847, 0 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

Starting numbers in concatenations are given by A052080.

LINKS

C. Rivera, Prime Puzzle 78

CROSSREFS

Cf. A052077, A052079, A052080.

Sequence in context: A193273 A039622 A130506 * A069544 A085460 A139835

Adjacent sequences:  A052075 A052076 A052077 * A052079 A052080 A052081

KEYWORD

nonn,base,nice

AUTHOR

Patrick De Geest (pdg(AT)worldofnumbers.com), Jan 15 2000.

EXTENSIONS

Terms for n>6 calculated by Carlos Rivera (crivera(AT)primepuzzles.net) and Felice Russo (frusso(AT)micron.com).

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Last modified February 16 20:23 EST 2012. Contains 205962 sequences.