We present a catalog of 99203 wide binary systems, initially identified as common proper motion (CPM) pairs from a subset of ~5.2million stars with proper motions {mu}>40mas/yr, selected from Gaia data release 2 (DR2, I/345) and the SUPERBLINK high proper motion catalog (Lepine 2005, J/AJ/130/1247 and Lepine & Gaidos 2011, J/AJ/142/138). CPM pairs are found by searching for pairs of stars with angular separations <1{deg} and proper motion differences {Delta}{mu}95% of being real wide binaries. Of those 99203 high-probability pairs, we estimate that only about 364 pairs are most likely to be false positives. In addition, we identify 57506 pairs that have probabilities greater than 10% from the first pass but have high parallax errors and therefore were not vetted in the second pass. We examine the projected physical separation distribution of our highest probability pairs and note that the distribution is a simple exponential tail and shows no evidence of being bimodal. Among pairs with lower probability, wide binaries are detected at larger separations (>10^4^-10^5^au), consistent with the very wide population suggested in previous studies; however, our analysis suggests that these do not represent a distinct population, but instead represent either the exponential tail of the "normal" wide binary distribution or are simply chance alignments of unrelated field stars. We examine the Hertzsprung-Russell diagram of this set of high-probability wide binaries and find evidence for 980 overluminous components among 2227 K+K wide binaries; assuming these represent unresolved subsystems, we determine that the higher-order multiplicity fraction for K+K wide systems is at least 39.6%.

Cone search capability for table J/ApJS/247/66/table4 (Data on primary stars in pairs that have probabilities greater than 10% from the first pass probabilities and have parallax errors less than 10% of the parallax)

Cone search capability for table J/ApJS/247/66/table5 (Data on secondary stars in pairs that have probabilities greater than 10% from the first pass probabilities and have parallax errors less than 10% of the parallax)

Cone search capability for table J/ApJS/247/66/table7 (Data on primary stars in pairs that have probabilities greater than 10% from the first pass probabilities but have parallax errors >10% of the parallax itself)

Cone search capability for table J/ApJS/247/66/table8 (Data on secondary stars in pairs that have probabilities greater than 10% from the first pass probabilities but have parallax errors >10% of the parallax itself)