42100...00003 (16023-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 'Sariyar': (Click here to show all)

421*10^n+3 is a probable prime for n = 16020 and no other 0 ≤ n < 16020. [Sariyar]