Hello,
Issue: I have a large summary of statistics data set of 15 million SNPs with Zscores that was shared by a former colleague (who I unfortunately CAN NOT reach him via email). I would like to distill the 15 mills rows of SNPs to just the ones with statistically significant so I cross check them with a twothousand of interest.
I would really appreciate any suggestion/or guidance on the following:

A package that can convert ZScores to Pvalue?

Are there package(s) that would help me efficiently filter out the significant SNPs and allow me to compare two columns from two different data.frame files?