A055166 Number of Mersenne prime exponents between 10^n and 10^(n+1).

4, 6, 4, 8, 6, 5, 5

Offset

0,1

Links

Table of n, a(n) for n=0..6.

GIMPS, Great Internet Mersenne Prime Search

Example

There are 4 Mersenne prime exponents between 10^0 and 10^1; 6 between 10^1 and 10^2; ... . There are 9 known Mersenne primes between 10^7 and 10^8 so for now, the next entry is 9.

Crossrefs

Cf. A000043.

Sequence in context: A245556 A256318 A018835 * A202243 A130762 A054002

Adjacent sequences: A055163 A055164 A055165 * A055167 A055168 A055169

Keyword

nonn,hard

Author

Marvin Ray Burns, Jun 18 2000; updated Jan 07 2006, Jan 15 2009

Status

approved