The PAN of Ramakrishna Mission is AAAAR1077P
The PAN of Ramakrishna Math is AAATR3497G
Donation is exempted under section 80G(1)(ii) read with section 80G(4) as the institution (Ramakrishna Math along with its branch centres; Ramakrishna Mission along with its branch centres) got approval order under section 80G(5)(vi) read with section 80G(2)(a)(iv) of the Income-tax Act, 1961.
50% of donation amount is deducted (maximum ceiling 10% of gross total income) from total income (Category 80GD as per ITR form).
The Income-tax PAN is usually mentioned in the Donation Receipt itself.
The PAN Name of Institution would be either Ramakrishna Math or Ramakrishna Mission. Please check the donation receipt. If it is a branch centre, the same is declared in the Donation Receipt itself (just below the branch centre name).