80561...21747 (26-digits)

This number is a prime.

                                                805616 6352780240 6257321747

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

Ramanujan's τ(n) function is composite for 2 ≤ n ≤ 63000. It is first prime at n = 63001. [Caldwell]