59

This number is a prime.

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

59 is conjectured to be the only prime p such that the sum of all prime and composite digits up to p are equal, i.e., 2+3+5+7+2+...+5 = 4+6+8+9+4+...+9. [Sariyar]