49598...12918 (32-digits)

This number is a composite.

                                         49 5986669891 5122609810 4244512918

A theorem by Filaseta and Gross: Let f(x) ∈ Z[x] be polynomial with nonnegative coefficients and f(10) is a prime. If each coefficient of f is less than or equal to 49598666989151226098104244512918, then f(x) is irreducible. [Poo Sung]