7315939

This number is a prime.

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

7315939 is the smallest term for a Honaker prime chain of length n=4. The sequence begins 131, 457, 1571, 7315939, ..., e.g., π(7315939) = 496657 (sum of digits (sod) = 37), prime[7315939] = 128837017 (sod = 37), prime[128837017] = 2660208571 (sod = 37), prime[2660208571] = 63383245021 (sod = 37) . [Sariyar]