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Old 2018-06-02, 17:41   #8
kriesel
 
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Mar 2017
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Quote:
Originally Posted by axn View Post
But keep also in mind that 10^1000000 has 1000001 digits, and 10^999999 has 1000000 digits.
Good point, and part of why I originally included two columns in the quick reference table in the attachment, the lowest and highest integer exponents for Mersenne numbers to have precisely 10n digits, vs. 10n values, n=1,2,..10.
1010^6 has 106+1 decimal digits, but 1010^6-1 has 106, as does 1010^6/9.99 or 1010^6/8.
I just now checked the cell formulas in the underlying spreadsheet against http://oeis.org/A034887 which covers2p, p=0,1,...72.

Last fiddled with by kriesel on 2018-06-02 at 18:20
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