A066227 Number of digits in Mersenne primes with a prime number of digits.

2, 3, 19, 157, 2917

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