[seqfan] Re: Decimal expansion of sum of the reciprocals of the Mersenne primes

Richard Mathar mathar at strw.leidenuniv.nl
Mon Mar 1 18:16:15 CET 2010


The constant in http://list.seqfan.eu/pipermail/seqfan/2010-March/003789.html
is near
x := 0.51645417894078856533048734297152285881596855341541970144193106527356870144021272349915488329366621537403243211083656957...

Digits := 120 ;
L := [
2, 3, 5, 7, 13, 17, 19, 31, 61, 89, 107, 127, 521, 607, 1279, 2203, 2281, 3217, 4253, 4423, 9689, 9941, 11213, 19937, 21701, 23209, 44497, 86243, 110503, 132049, 216091, 756839, 859433, 1257787, 1398269, 2976221, 3021377, 6972593, 13466917
] ;
x := 0 ;
for i from 1 to 30 do
	x := x+1.0/(2^op(i,L)-1 );
end do ;




More information about the SeqFan mailing list