$250k and permanently fund an athletic scholarship. BYU's goal is to have all athletic scholarships fully endowed.

"Benefits of Your Annual or Endowed Scholarship:
Meaningful connection with BYU Student-Athletes
Assist a student-athlete in fulfilling their lifelong athletic goals
Personally interact with your assigned student-athlete
Receive Legacy level Cougar Club credit
Be a mentor for your scholarship recipient
Choose the name of your scholarship
Attend sport practice
Attend Annual Scholarship Banquet
Receive updates on your student-athlete
Placement of personalized plaque on Scholarship Wall in Legacy Hall"

PS - it's worth considering that the Church has stopped taking donations for the perpetual education fund. Worth thinking about why that might be (I don't have the answer).