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A066227 Number of digits in Mersenne primes with a prime number of digits. 0
2, 3, 19, 157, 2917 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

a(4) is M21, the 21st Mersenne prime with prime digit count of 2917

CROSSREFS

Cf. A028335.

Sequence in context: A241350 A032329 A219285 * A061490 A048827 A032077

Adjacent sequences:  A066224 A066225 A066226 * A066228 A066229 A066230

KEYWORD

nonn,base

AUTHOR

Enoch Haga, Dec 18 2001

STATUS

approved

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Last modified October 24 02:02 EDT 2021. Contains 348217 sequences. (Running on oeis4.)