In Jainism, all 24 Tirthankaras are considered spiritually equal, having attained perfect knowledge (Kevala Jnana), liberation (moksha), and are free from all karmas. However, in practice, some Tirthankaras are worshipped more prominently than others due to several cultural and historical reasons:

1. Mahavira (24th Tirthankara): As the most recent Tirthankara, Mahavira's life, teachings, and historical presence are well-documented and have had a direct influence on the current Jain community. Many rituals, scriptures, and festivals are centered around him.

1. Parshvanatha (23rd Tirthankara): Parshvanatha is another widely revered Tirthankara because his teachings and following were already established before Mahavira, and many of his traditions were incorporated into Mahavira’s reformulation of Jainism.

1. Rishabhanatha (Adinatha, 1st Tirthankara): As the first Tirthankara, Rishabhanatha is honored as the founder of the Jain tradition and the one who first taught the dharma in this era.

1. Local and Historical Significance: Certain Tirthankaras are associated with specific regions, temples, or miraculous events, leading to a strong local or sectarian following. For example, Neminatha is especially popular in Gujarat, and Shantinatha in some regions of South India.

1. Availability of Idols and Temples: Some Tirthankaras have more ancient and prominent temples dedicated to them, making their worship more common. For example, the idol of Lord Gommateshwara Bahubali (son of Rishabhanatha) is widely worshipped due to the famous monolithic statue at Shravanabelagola, Karnataka.

Important to Note: Jain philosophy emphasizes that all Tirthankaras are equal in their spiritual achievement. The differences in worship are due to practical, historical, and cultural factors rather than any theological hierarchy.

References:

• Jainism: An Introduction by Jeffery D. Long
• Tattvartha Sutra by Umāsvāti
• "The Jains" by Paul Dundas