73556...65537 (1001-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 'Rivera': (Click here to show all)

Palindromic prime formed by concatenating of all five known Fermat primes or their reversals: 3, 5, 17, 257 and 65537. [Rivera]