Short answer: 11 Logassa kāusagga.

• Śvetāmbara Mūrtipūjaka temples commonly observe 11 Logassa kāusagga as part of Dev‑Vandan on Mahavir Janma Kalyānak.
• In some places, additional jap (like 108 Navkār) is added, but the core Logassa kāusagga count remains 11.
• Digambara traditions generally do kāyotsarga/Navkār‑jap for the Kalyānak without a universally fixed “11 Logassa” requirement; local vidhi may vary.

For a simple overview of Janma Kalyānak observances and Dev‑Vandan basics, see: