Gautam Swami’s Nirvan (parinirvana) is traditionally placed as follows:

• He attained Nirvan at the age of 92.
• The commonly cited year is 515 BCE.

Note: In Jain history, there can be slight differences between Digambar and Shvetambar chronologies for some dates, but for Gautam Swami the 515 BCE Nirvan date is the widely accepted Mulya (standard) mark in many traditional accounts. ( jainsite.com, jainsquare.wordpress.com)