%0 Journal Article %T SOME PROPERTIES OF THE SEQUENCE OF PRIME NUMBERS %A Laurentiu Panaitopol %A Vlad Copil %J Applicable Analysis and Discrete Mathematics %D 2008 %I University of Belgrade and Academic Mind %R 10.2298/aadm0802217c %X Let $p_n$ be the $n$-th prime number and $x_n=p_{n+1}^{;n+1}/p_n^{;n}$. We show that the sequence $(x_n)_{ngeN}$ is not monotonic for any integer $N>1$ and that the series $sumlimits_{n=1}^{+infty} 1/x_n$ is divergent. Related series are studied as well. %K Prime numbers %K sequences %K series %U http://pefmath.etf.bg.ac.yu/vol2num2/AADM-Vol2-No2-217-221.pdf