In Jain tradition, there is no single commonly cited “year gap” between Shreyansnath (11th Tirthankara) and Mahavir Swami (24th Tirthankara). They are separated by 13 Tirthankaras, and Jain chronology treats their lives in vast cosmic time spans, not ordinary historical dating. Shreyansnath is traditionally said to have lived 84 lakh years, while Mahavir Swami lived 72 years. ( jainknowledge.com)

So, the most accurate Jain answer is: the gap was immense and cosmic, not a simple historical number. ( jainqq.org)