Aadinath Bhagwan ki āyu (lifespan) Jain granthon ke anusār bahut hii dīrgh batāī gayī hai:

• Rishabhdev / Aadinath Bhagwan ki āyu:

Yah āyu “purva” nām ke bahut baṛe samay-māp se māpī jātī hai. Ek purva sādharan varsh se anant guṇā baṛā samay hotā hai, isliye isko normal human years mein badalnā lagbhag asambhav jaisā hai – keval itnā samajhnā chāhiye ki:

> Aadinath Bhagwan ki āyu triliyan-triliyan varsh se bhī kai guṇā adhik mānī jātī hai.

Śvetāmbara paramparā mein 84 lakh purva spasht rūp se ullikhit hai; Digambar paramparā mein bhī mūl rūp se yahī dīrgh āyu svīkār kī jātī hai (ankon mein halka antar ho sakta hai, par bahut baṛā nahīn).

Is vishay par ek saral list sabhī 24 Tirthankar ki āyuoṅ ke sāth yahan mil sakti hai: “All Tirthankar ages”