13646...00001 (593-digits)

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

Just showing those entries submitted by 'Gupta': (Click here to show all)

The product of first 259 even numbers (2 through 518) plus 1 is the only known prime of this type, as of 23 July 2020. [Gupta]