57137...97531 (209-digits)

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

 571371171 9617615613 6116195175 1551351151 9417415413 4114193173 1531331131
9217215213 2112191171 1511311111 9017015013 0110199795 9391998785 8381897775
7371796765 6361695755 5351594745 4341493735 3331392725 2321291715 1311197531

The largest non-titanic prime formed from the reversal of the ordered concatenation of the first n odd numbers (case n=88). [Gupta]