I notice on Wikipedia that it lists the total number of Jewish adherents at ~14 million, and it lists the number of adherents in the The Church of Jesus Christ of Latter-day Saints (Mormonism) at ~15.3 million. Are there really more Mormons in the world then there are Jews?
Yes, this seems to be right.
I found this report which states worldwide Jewish population to be estimated at about 13,8 million in 2013. At the latest LDS General Conference (April 2015), the statistical report stated 15,3 million members at the end of 2014.
Note that as I said in the comments, we are comparing apples to oranges here. Jewish population grows mainly through births, while LDS membership grows through births and convert baptisms.