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A090742 a(n) = largest prime such that any n consecutive digits gives a distinct prime. 0
7523, 619737131179, 9419919379719113739773313173, 9551979199733313739311933719319133, 763031379939791939113997931991393133317939371999719, 9651473911777911173191173713117119, 99071479791317917331771937311, 6195066779711393117319331177319 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

J. R. Rickard and J. J. Hitchcock, Problems Drive, Eureka, 40 (1979), 28-29 (problem nr. 10), 40 (solutions).

LINKS

Table of n, a(n) for n=1..8.

Carlos Rivera, Puzzle 253: "Eureka?", The Prime Puzzles & Problems Connection.

EXAMPLE

In 619737131179 the strings 61, 19, 97, ..., 79 form distinct primes. No larger prime has this property, so a(2) = 619737131179.

CROSSREFS

Sequence in context: A258605 A258604 A093225 * A273382 A186938 A185749

Adjacent sequences:  A090739 A090740 A090741 * A090743 A090744 A090745

KEYWORD

nonn,base

AUTHOR

Ray G. Opao, Feb 03 2004

EXTENSIONS

a(4) through a(8) found by J. K. Andersen.

STATUS

approved

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Last modified May 22 22:13 EDT 2022. Contains 353959 sequences. (Running on oeis4.)