We have calculated on the computer the sum BM of reciprocals of first 47 known Mersenne primes with the accuracy of over 12000000 decimal digits. Next we developed BM into the continued fraction and calculated geometricalmeans of the partial denominators of the continued fraction expansion of BM . We get values converging to the Khinchin’s constant. Next we calculated the n-th square roots of the denominators of the n-th convergents of these continued fractions obtaining values approaching the Khinchin-Lèvy constant. These two results suggests that the sum of reciprocals of all Mersenne primes is irrational, supporting the common belief that there is an infinity of the Mersenne primes. For comparison we have done the same procedures with a slightly modified set of 47 numbers obtaining quite different results. Next we investigated the continued fraction whose partial quotients are Mersenne primes and we argue that it should be transcendental.
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