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A089335 Smallest number using a single digit with multiplicity such that every partial concatenation is prime. 1
2, 3, 3, 3, 3, 77, 1, 333333, 33, 3333, 9, 77777777777, 999999999, 33333333333333333333333333, 99, 9999, 99, 777777777777, 777777777777777777777777777777777777777777777777777777, 33333333333333333333333333333333333333333333333333, 3333333333333333, 9999999999999999999999999999999999999999 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
LINKS
EXAMPLE
2, 23, 233, 2333, 23333, 2333377, etc. are primes.
CROSSREFS
Sequence in context: A051670 A089702 A089336 * A088093 A282352 A256858
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Nov 04 2003
EXTENSIONS
More terms from Sam Handler (sam_5_5_5_0(AT)yahoo.com), Sep 26 2004
STATUS
approved

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Last modified March 29 06:15 EDT 2024. Contains 371265 sequences. (Running on oeis4.)