What is Trinity Hall Prime number? It is a prime number with 1350 many digits. I did not get much information about this number on the internet. 

Question : What is Trinity Hall Prime number?

I watched this video but did not get the number.
 A: It is a prime number with lots of $1$s and $8$s and some $0$s and other digits which looks like the coat of arms of Trinity Hall, Cambridge (not to be confused with its bigger neighbour Trinity College, Cambridge) and which has $1350$ digits the date of founding of Trinity Hall 

A: Basically, it's like ASCII art, but with a still more limited "palette," of the coat of arms of Trinity Hall, Cambridge, though with the added bonus that interpreted on a single line as one number it's a prime number.
You too can make yourself that kind of ASCII art for your own coat of arms or other such symbol. First, compose the digits in the pattern that you want. Then, in a program like Mathematica, use the NextPrime function. Provided you don't make the number too large, you should be able to get the answer in a few seconds.
Heck, even Wolfram Alpha doesn't take too long to respond to NextPrime[10^1350] with $10^{1350} + 271$. But you might run into problems trying to send Wolfram Alpha the number from your ASCII art. So you need Mathematica on your own computer.
You might need to tweak the last few digits, i.e., if you made the last line short by mistake.
A: I saw the actual thing in real life in the Senior Combination Room at Trinity Hall (Cambridge, England):

When junior research fellows get to the end of their stint (usually after three years), they traditionally give some gift to the college that represents "something about them". In this case, that "something" is an ASCII number in the shape of the coat of arms of the college. The number 1350 (the number of digits) is significant as it's the year that the college was founded by Bishop Bateman.
It is in a wooden frame, displayed among other pictures, paintings, and the trappings of a Cambridge college.
