A billion seeds and counting

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A billion seeds and counting

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Let As be the product of the first s primes, let Ps be the set of primes p for which p−1 divides As but p does not divide As, and let Cs be the set of Carmichael numbers n such that n is composed entirely of the primes in Ps and such that As divides n − 1. Erdős argued that, for any ε > 0 and all sufficiently large x (depending on the choice of ε), the set Cs contains more than x1−ε Carmichael ...

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0.5 billion events per second time correlated single photon counting using CMOS SPAD arrays.

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ژورنال

عنوان ژورنال: Current Biology

سال: 2007

ISSN: 0960-9822

DOI: 10.1016/j.cub.2007.05.025