A110767 - OEIS

A110767

a(1) = 11 then the least number of concatenation of n that gives prime when placed on the most significant side of the previous concatenation.

11, 2, 33, 444, 55, 6, 777777777777

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OFFSET

1,1

COMMENTS

Contribution from David Wasserman, Dec 30 2008: (Start)

Next term has 634 digits.

A088061 gives the primes. (End)

LINKS

EXAMPLE

11,211,33211,44433211,5544433211,... are all primes.

CROSSREFS

Cf. A088061. [From David Wasserman, Dec 30 2008]

KEYWORD

base,nonn

AUTHOR

STATUS

approved