

A228226


Integer lengths of log(2)primes: numbers n such that the concatenation of the first n decimal digits of log(2) is prime.


1




OFFSET

1,1


COMMENTS



LINKS



EXAMPLE

log(2) = 0.6931471805... and the 321digit number 6931...0641 is the smallest prime in the first digits, so a(1) = 321


CROSSREFS

Cf. A002162 (decimal digits of log(2)).


KEYWORD

nonn,base,hard


AUTHOR



EXTENSIONS



STATUS

approved



