what does jquery attribute (jquery1917604953657536576="12") mean in below code snippet? [on hold]

what does jquery attribute (jquery1917604953657536576="12") mean in below code snippet?

<a jquery1917604953657536576="12" href="javascript:void(0);" class="viewBillPdf" 
   id="first">View bill in PDF format</a>

Thanks in advance.