16180...08161 (921-digits)

This number is a probable-prime (likely to be a prime but we have not (re-)proven it on this site).

The largest non titanic palindromic prime formed from the reflected decimal expansion of Golden Ratio. It is a 921 digit number. Interestingly the largest non titanic palindromic prime formed from the reflected decimal expansion of pi is also a 921 digit number. [Gupta]